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agrasan

Bunuel
A customer purchased 6 shirts priced at $10.99 each, excluding sales tax. How much sales tax did he pay on this purchase?

(1) The customer paid a 5 percent sales tax on the total price of the shirts.
(2) The customer paid a total of $11.54 for each shirt, including sales tax.


DS21185
­
Hi GMATNinja KarishmaB

For statement 2, how can we assume that sales tax is the only tax considered for the total price? If this is the case then statement 2 shouldn't be sufficient alone to answer the question because we don't how much are the other taxes like x, y, z, etc. Please let me know where I thought wrong here. I had selected Option (A) due to this thinking.
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From the wording of the question, we can figure that only sales tax is in play.

6 shirts priced at $10.99 each, excluding sales tax
$11.54 for each shirt, including sales tax

In a generic economic model, one would normally have pre tax cost and with tax cost and that tax would be sales tax at the consumer level. Hence I don't find any ambiguity in this question. 
Though rest assured that if, in the experimental stage, they find that it does cause ambiguity, they would not make it live.  
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