Answer:
$8.50
Explanation:
Since the gift is $25.50, including tax, and there are three sisters, divide the cost of the gift ($25.50) by the number of sisters (3) to find how much each one of them has to pay.
25.50 ÷ 3
= $8.50
Each sister should pay $8.50.
Have a lovely rest of your day! :)