A man buys 4 items at a 7-11 store and the following conversation takes place:
Customer: How much is it?
Cashier: How curious, the total amount is $7.11 !
Customer: How did you get that total?
Cashier: Easy, I multiplied the 4 prices and I got the result 7.11
Customer: Are you nuts? You are supposed to add the prices, not multiply them!
Cashier: Well, that would give the same result!
What are the prices of each of the 4 items purchased?
7.11 = 3.16 + 1.25 + 1.50 + 1.20
= 3.16 x 1.25 x 1.50 x 1.20
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