Miss jones attended a a southern living home party she purchased a vase which cost $34.99the shipping charge was three dollars and 8.25% sales tax was paid on the subtotal which included the shipping charge how much did you pay for the vase

The answer is $41.12
(Work is below)

First add the total of the vase and shipping-
Vase:                    $34.99
Shipping:              $   3.00
                         +
                             $37.99

Then calculate sales tax by multiplying $37.99 x 0.0825 -
Above Total:         $37.99
Sales Tax Rate:    $   0.0825
                         x
                              $  3.1341
You round down because ^ less than five (five or above you would round up)

Sales Tax:             $3.13

Then you add the sales tax to the above total

Vase:                    $37.99
Shipping:              $  3.13
                         +
                             $41.12

Iam thinking the answer is a.) knew