\"\"

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A department store sells shirts for \"\" each.

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Dalila buys \"\", Latisha buys \"\", and Pilar buys \"\".

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a.

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The expressions to represent the cost of store received is \"\".

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By using distributive property: \"\", expand the expression.

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\"\".

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Therefore, the expression is \"\".

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\"\"

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b.

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The expression is \"\".

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By using distributive property: \"\", expand the expression.

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\"\"

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                          \"\"                           (Multiply)

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                          \"\"                                                  (Add: \"\")

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Therefore, the store received is\"\".

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\"\"

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a.The expression of cost of store received is \"\".

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b.The store received is\"\".