A certain grocery purchased x pounds of pr
题型：单项选择题
问题：
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)