Ashopper paid $51.93 including tax for an item marked $48.99 what would she pay for another item marked $75?

Amount of money paid by the shopper including tax = $51.93
Actual cost of the item = $48.99
Then
Amount of tax paid = (51.93 - 48.99) dollars
                               = 2.94 dollars
So
Percentage of tax taken = (2.94/48.99) * 100
                                       = 294/48.99
                                       = 6.00 percent
Cost of another item = $75
percentage of tax to be given = 6%
Amount of tax to be paid = (6/100) * 75
                                         = 450/100 dollars
                                         = 4.5 dollars
So
The total payment for the item costing $75 is = (75 + 4.5) dollars
                                                                         = 79.5 dollars
So $79.5 needs to be paid by her for the item priced $75.