A clothing retailer used to sell only "fast-fashion" pieces, which were low priced and had a profit markup of 50 percent of the per-item cost (including, for example, the costs of wholesale purchase and marketing). On average, each customer spent $850 annually on around 65 such pieces from the retailer. Now the retailer wishes to double its total profits by selling only "classic" pieces. It plans to double its percentage profit markup per item and generate more revenue per customer while leaving unchanged the company's total costs. The plan assumes that for each classic piece, on average, customers will pay five times what they paid for each fast-fashion piece, and that the total number of customers for the retailer's clothing products will remain the same.The highlighted portion simply means that the company's profit margins are increased exclusively due to a change in markups, and not due to other cost-cutting measures elsewhere (overheads, rent, marketing etc.)
In fast fashion, C was the cost to purchase goods, 850 was the revenue on those goods at 50% markup.
In the classic items, C is still the cost to purchase goods and something greater than 850 will be the revenue on those goods at 100% markup.
ANSWER 1
This one is straightforward.
Each customer pays $850 per 65 items. Avg: 850/65 = 13.07 = ~13 Remember this. We will need this later....... Statement ( 1 )
ANSWER 2
Let's go step by step. ANSWER 2 asks for a minimum number at which the goal is reached i.e. the profit is doubled.
We are working with Avg here, so we can use a typical customer for all our calculations.
Before we start, let the minimum number be n.
Step 1 - IDENTIFY THE GOAL - The goal here is to double the profit from a customer who was spending $850 per year, who will now spend more money per year.
Step 2 - CALCULATE THE COST AND PROFIT ON 850 AT 50% MARKUP. (Just leave it in fractions for now)
Cost * 1.5 = 850
Cost = 2/3 * 850 .................. Statement ( 2.0 )
Profit = 1/3 * 850 .... profit on annual average transations
STEP 3 - CALCULATE THE GOAL
Goal Profit = 2 * 1/3 * 850 ...... Statement ( 2.1 )
Notice that this is equal to the Cost.
Step 3 - CALCULATE REVENUE TO GENERATE THIS PROFIT BY TWO WAYS -
Revenue = number of items * cost per item
Revenue = total selling price of all items = cost + markup on cost
The retailer reasons that he can sell more dollars worth of items at a markup double the fast fashion markup.
Fast fashion markup = 50%
Hence, classic piece markup = 100%
From all of this reasoning, we come to understand that the retailer needs to sell goods at a 100% markup such that the cost is same, the price per item is 5 * Avg, the number of items is n and the profits are equal to Goal Profit (statements 1, 2.0 and 2.1)
Piece is all together:
n * 5 * Avg = new revenue per customer
Cost * 2 = Cost + Goal Profit = new revenue per customer (cost + 100% markup on cost = 2 * Cost)
Replace the values from statements 1, 2.0 and 2.1.
n * 5 * 850/65 = 2/3 * 850 * 2
n = 17.33
Rounds off to 17.