A store calculates the sales tax on an item as dollars, where is the original price of the item in dollars. If a customer buys an item that is priced at dollars, which of the following expressions represents the sales tax, in dollars, on this item?
0.07(1.5p)
0.07 + 1.5p
1.5(0.07 + p)
0.07p + 1.5p
