Answer: The markup percentage of 100% means the store added an amount equal to the original cost of the chair to its price, so the selling price of the chair before tax was 494.47 * 2 = $989.94.
The sales tax is calculated as 5.5% of the selling price before tax, which is 5.5/100 * 989.94 = $54.45.
The total amount paid by Sally for the leather chair, including tax, is 989.94 + 54.45 = $1044.39.
Explanation: