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?
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A(x - y)s - xp
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B(x - y)s - ys
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C(s - q)y - xp
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Dxp - ys
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E(x - y)(s -p)