Jackson buys a watermelon for $8.55 and 4 pounds of chemes. Tim buys a pineapple for $2 15 and 3 pounds of chemies. Use the variable p to represent the price in dollars, per pound of cherries. Write and simplify an expression to represent how much more Jackson spent.
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The expression represents how much more Jackson spent than Tim
(Simplify your answer. Use integers or decimals for any numbers in the expression)