Answers by visitors named: I'm your new math helper

$12.00Sales Tax = 10% x $12 = 0.1 x 12 = $1.20Total Cost = $12.00 + $1.20 = $13.20 Answer: $13.20

$87.74

yes PsyDAG, 1.07 * 82 = 87.74 therefore, The actual cost of the headphones would be $87.74. Thanks for you contribution.