The Expression is (20)(30)+(15)(15)-130
Number of keyboards bought by store = 20
Number of phone charger bought by store = 15
Price of each keyboard = 30
price of each phone charger = 15
Part A
Amount of money the store made = (number of keyboards)(Price of each keyboard)+(Number of phone charger)(price of each phone charger)-(the cost of purchase)
Substituting the values we get
Amount of money = (20)(30)+(15)(15)-130
Part B:
The answer in Part A is correct because the total price of the commodity can be calculated by multiplying the price of the item with number of items bought.
Part C :
The value of the expression in part A is $600+$225-$130=$695
Therefore , The value of the expression is $695.
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