单选题 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?

A、 (x-y)s-xp
B、 (x-y)p-ys
C、 (s-p)y-xp
D、 xp-ys
E、 (E) (x-y)(s-p)

【正确答案】 A

【答案解析】