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$$(x - y)p - ys$$
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C$$(s - p)y- xp$$
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D$$xp -ys$$
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E$$(x - y)(s - p)$$