A gold necklace and marked it up 110% from the original cost of $23.52. Later on, Dean purchased the gold necklace and paid 14.75% sales tax. How much, including tax, did he pay for the gold necklace?

Answer 1

23.52(1.1) = $25.87 before tax

tax of 14.75% means an after tax cost of 25.87(1.1475) = $29.69 rounded off to nearest penny, if you interpret 110% mark up as the original value (100%) plus a 10% markup. It's possible that's what the problem may want.

However I'd go with the following

110% markup really means 2.2 times original cost = 23.52(2.2) = $51.74 = before tax cost

add 14.75% tax means 51.74(1.1475) = $59.37 = after tax, after mark up