The question.

6. A store is offering a 20% discount on all sales over $50. If you purchase a shirt and a pair of jeans for $62.50, what is the amount of the discount you would receive?

A. $15.63 B. $10.00 C. $12.50 D. $50.00

The solution to this problem can be found by taking 20% of $62.50:

0.2 (62.5) = 12.5

The way the question is worded is confusing, but I think it's asking how much of a discount you would get. You would receive a $12.50 discount.