A certain grocery purchased x pounds of produce for p dollars per pound. If y pounds of the produce had to be discarded due to spoilage and the grocery sold the rest for s dollars per pound, which of the following represents the gross profit on the sale of the produce?

Let me break it down to the best of my ability.

A certain grocery purchased x pounds of produce for p dollars per pound.

This tells me to multiply x times p or xp.

If y pounds of the produce had to be discarded due to spoilage and the grocery sold the rest for s dollars per pound, which of the following represents the gross profit on the sale of the produce?

So, y pounds discarded means to subtract y from x or (x - y).

The grocery sold the rest for s dollars per pound. I figure that

(x - y) represents THE REST. If so, this leads to (x - y)s or

s(x - y). If my logic is clear, the answer is A, right? If my logic makes no sense, please tell me why.

A. (x - y)s - xp

B. (x - y)p - ys

C. (s - p)y - xp

D. xp - ys

E. (x - y)(s - p)