Use Exhibit 18-1 to determine the sales tax (in $) and calculate the total purchase price (in $) for the item. (Round your answers to the nearest cent.) \fLast month The Sweet Tooth Candy Shops had total sales, including sales tax, of $51,889. The stores are located in a state that has a sales tax of 7%%. (Round your answers to the nearest cent.) (a) As the accountant for The Sweet Tooth, calculate the amount of sales revenue (in $) for the shops last month. $:] (b) As the accountant for The Sweet Tooth, calculate the amount of sales taxes (in $) that must be sent to the state Department of Revenue. $:]