Answer:
$22.68 (to the nearest cent)
Explanation:
A 115% markup can be calculated in this way: 1.15($10) = $11.50.
Thus, the selling price is $10 + $11.50, or $21.50.
The price the customer must pay, including the 5 1/2% tax, is
1.055($21.50), or $22.68 (to the nearest cent)