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At the beginning of last month, a stationery store had in [#permalink] New post 24 Oct 2009, 03:39
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At the beginning of last month, a stationery store had in stock 250 writing pads, which had cost the store $0.75 each. During the same month the store made only one purchase of writing pads. What was the total amount spent by the store on the writing pads it had in stock at the end of last month?

(1) Last month the store purchased 150 writing pads for $ 0.80 each.
(2) Last month the total revenue from the sales of the writing pads was $180.
[Reveal] Spoiler: OA

Last edited by Bunuel on 22 Jun 2013, 07:41, edited 3 times in total.
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At the beginning of last month, a stationery store had in [#permalink] New post 24 Oct 2009, 09:03
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At the biginning of last month, a stationery store had in stock 250 writing pads, which had cost the store $0.75 each. During the same month the store made only one purchase of writing pads. What was the total amount spent by the store on the writing pads it had in stock at the end of last month?

GMAT likes tricks.

We are asked to determine the cost of goods in the end of the month.

(1) Last month the store purchased 150 writing pads for $ 0.80 each --> cost of goods at the beginning of the month=0.75*250, plus 150*0.8 store purchased during the month, BUT as long as we don't know how many pads store sold last month we cannot determine the number of pads left at the end of the month. Not sufficient.

(2) Last month the total revenue from the sales of the writing pads was $180. Well this is clearly insufficient. Was any number purchased during the month? What was the selling price of a pad? Not sufficient.

(1)+(2) We know how many and at what price was purchased during the month, plus we are told the revenue was 180, but we don't know the selling price of one pad, thus cannot determine how many was sold and how many left.

Answer: E.
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Re: Writing Pads [#permalink] New post 12 Sep 2013, 07:28
Bunuel wrote:
At the biginning of last month, a stationery store had in stock 250 writing pads, which had cost the store $0.75 each. During the same month the store made only one purchase of writing pads. What was the total amount spent by the store on the writing pads it had in stock at the end of last month?

GMAT likes tricks.

We are asked to determine the cost of goods in the end of the month.

(1) Last month the store purchased 150 writing pads for $ 0.80 each --> cost of goods at the beginning of the month=0.75*250, plus 150*0.8 store purchased during the month, BUT as long as we don't know how many pads store sold last month we can not determine the number of pads left at the end of the month. Not sufficient.

(2) Last month the total revenue from the sales of the writing pads was $180. Well this is clearly insufficient. Was any number purchased during the month? What was the selling price of a pad? Not sufficient.

(1)+(2) We know how many and at what price was purchased during the month, plus we are told the revenue was 180, but we don't know the selling price of one pad, thus can not determine how many was sold and how many left.

Answer: E.


Is it necessary that a sale was made last month ?
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Re: Writing Pads [#permalink] New post 12 Sep 2013, 07:38
Expert's post
ygdrasil24 wrote:
Bunuel wrote:
At the biginning of last month, a stationery store had in stock 250 writing pads, which had cost the store $0.75 each. During the same month the store made only one purchase of writing pads. What was the total amount spent by the store on the writing pads it had in stock at the end of last month?

GMAT likes tricks.

We are asked to determine the cost of goods in the end of the month.

(1) Last month the store purchased 150 writing pads for $ 0.80 each --> cost of goods at the beginning of the month=0.75*250, plus 150*0.8 store purchased during the month, BUT as long as we don't know how many pads store sold last month we can not determine the number of pads left at the end of the month. Not sufficient.

(2) Last month the total revenue from the sales of the writing pads was $180. Well this is clearly insufficient. Was any number purchased during the month? What was the selling price of a pad? Not sufficient.

(1)+(2) We know how many and at what price was purchased during the month, plus we are told the revenue was 180, but we don't know the selling price of one pad, thus can not determine how many was sold and how many left.

Answer: E.


Is it necessary that a sale was made last month ?


(2) says: last month the total revenue from the sales of the writing pads was $180.
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RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

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PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

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Re: Writing Pads [#permalink] New post 12 Sep 2013, 09:12
Is it necessary that a sale was made last month ?[/quote]

(2) says: last month the total revenue from the sales of the writing pads was $180.[/quote]

But A does not talk anything related to sales, if B says it could be extraneous info. If A in isolation is considered, we have a valid solution.

Do you think such debatable questions can come up in GMAT, if yes then it must be 800 question :) , otherwise there is nothing in the question.
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Re: Writing Pads [#permalink] New post 12 Sep 2013, 10:06
Expert's post
ygdrasil24 wrote:
Is it necessary that a sale was made last month ?


(2) says: last month the total revenue from the sales of the writing pads was $180.[/quote]

But A does not talk anything related to sales, if B says it could be extraneous info. If A in isolation is considered, we have a valid solution.

Do you think such debatable questions can come up in GMAT, if yes then it must be 800 question :) , otherwise there is nothing in the question.[/quote]

It's a GMAT Prep question and frankly I don't see anything debatable about its validity.

Also, it's not necessary that the stem, and each statement to talk about the same thing.
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COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

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Re: Writing Pads [#permalink] New post 12 Sep 2013, 16:17
Bunuel wrote:
At the biginning of last month, a stationery store had in stock 250 writing pads, which had cost the store $0.75 each. During the same month the store made only one purchase of writing pads. What was the total amount spent by the store on the writing pads it had in stock at the end of last month?

GMAT likes tricks.

We are asked to determine the cost of goods in the end of the month.

(1) Last month the store purchased 150 writing pads for $ 0.80 each --> cost of goods at the beginning of the month=0.75*250, plus 150*0.8 store purchased during the month, BUT as long as we don't know how many pads store sold last month we can not determine the number of pads left at the end of the month. Not sufficient.

(2) Last month the total revenue from the sales of the writing pads was $180. Well this is clearly insufficient. Was any number purchased during the month? What was the selling price of a pad? Not sufficient.

(1)+(2) We know how many and at what price was purchased during the month, plus we are told the revenue was 180, but we don't know the selling price of one pad, thus can not determine how many was sold and how many left.

Answer: E.


i am not sure about this. had the question mentioned revenue , your explanation would fit but it just asked for the amount spent. A gives that,
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Re: Writing Pads [#permalink] New post 12 Sep 2013, 18:30
Bluelagoon wrote:
Bunuel wrote:
At the biginning of last month, a stationery store had in stock 250 writing pads, which had cost the store $0.75 each. During the same month the store made only one purchase of writing pads. What was the total amount spent by the store on the writing pads it had in stock at the end of last month?

GMAT likes tricks.

We are asked to determine the cost of goods in the end of the month.

(1) Last month the store purchased 150 writing pads for $ 0.80 each --> cost of goods at the beginning of the month=0.75*250, plus 150*0.8 store purchased during the month, BUT as long as we don't know how many pads store sold last month we can not determine the number of pads left at the end of the month. Not sufficient.

(2) Last month the total revenue from the sales of the writing pads was $180. Well this is clearly insufficient. Was any number purchased during the month? What was the selling price of a pad? Not sufficient.

(1)+(2) We know how many and at what price was purchased during the month, plus we are told the revenue was 180, but we don't know the selling price of one pad, thus can not determine how many was sold and how many left.

Answer: E.


i am not sure about this. had the question mentioned revenue , your explanation would fit but it just asked for the amount spent. A gives that,


I was stumbled like the way you did and went wrong. But if you c the question ' What was the total amount spent by the store on the writing pads it had in stock at the end of last month?'

The question asks about the amount the store spent on books that were left at the end of the month, option A gives total amount spent on books that are initially available with the store. No information is given about the books present in the store at the end of the month. We need the number of books available with store at the end of the month. The store may/may not have sales in the month
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Re: Writing Pads [#permalink] New post 12 Sep 2013, 23:09
Expert's post
Bluelagoon wrote:
Bunuel wrote:
At the biginning of last month, a stationery store had in stock 250 writing pads, which had cost the store $0.75 each. During the same month the store made only one purchase of writing pads. What was the total amount spent by the store on the writing pads it had in stock at the end of last month?

GMAT likes tricks.

We are asked to determine the cost of goods in the end of the month.

(1) Last month the store purchased 150 writing pads for $ 0.80 each --> cost of goods at the beginning of the month=0.75*250, plus 150*0.8 store purchased during the month, BUT as long as we don't know how many pads store sold last month we can not determine the number of pads left at the end of the month. Not sufficient.

(2) Last month the total revenue from the sales of the writing pads was $180. Well this is clearly insufficient. Was any number purchased during the month? What was the selling price of a pad? Not sufficient.

(1)+(2) We know how many and at what price was purchased during the month, plus we are told the revenue was 180, but we don't know the selling price of one pad, thus can not determine how many was sold and how many left.

Answer: E.


i am not sure about this. had the question mentioned revenue , your explanation would fit but it just asked for the amount spent. A gives that,


Question asks: What was the total amount spent by the store on the writing pads it had in stock at the end of last month?
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


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Re: At the beginning of last month, a stationery store had in [#permalink] New post 13 Sep 2013, 12:57
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Hi Bunuel,
Just curious - why we're assuming that stored had sold some of the writing pads during the month? It's nowhere mentioned explicitly. Right..? In that way A should be the answer!

P.S: I know it's an official question so it has to be correct but I'm not able to get that properly. Please help me to connect that chord.
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Re: At the beginning of last month, a stationery store had in [#permalink] New post 10 Oct 2013, 06:07
I have another question. Even if we had known how many pads were sold, could we calcuate the amount spend on pad at the end of the month.
Because we bought 150 at different price and we sold 180. We do not know how many were from $0.80 stock.

Thanks
Amit
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Re: At the beginning of last month, a stationery store had in [#permalink] New post 07 Feb 2014, 04:26
AMITAGARWAL2 wrote:
I have another question. Even if we had known how many pads were sold, could we calcuate the amount spend on pad at the end of the month.
Because we bought 150 at different price and we sold 180. We do not know how many were from $0.80 stock.

Thanks
Amit


AMIT That's exactly it!

To summarize: So we know what the initial stock price is and we know that the store made only one purchase and know the total cost of the purchase. But we need to know about the pads sold. Now, if the store sold pads for 180 that's great but we still don't know what inventory remains since we have 2 different product costs (Remember FIFO and LIFO and all that stuff...). Well that's exactly it. Answer is E

Hope its clear now
Cheers
J
Re: At the beginning of last month, a stationery store had in   [#permalink] 07 Feb 2014, 04:26
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