Add all 3 costs to find the total cost before taxes.
448 + 14 + 7 = $469
Turn the percentage into a decimal.
6% = 0.06
Multiply the sales tax to the total cost.
0.06 * 469 = $28.14 (sales tax)
Add to the total price.
469 + 28.14 = $497.14 (total price after taxes)
Best of Luck!