Final answer:
Amir will pay a total of $77.84 for the skates after the discount and sales tax.
Step-by-step explanation:
To find the total amount Amir will pay for the skates, we need to calculate the discount and the sales tax. First, let's calculate the discount. 15% of $85.99 is $12.90. Subtracting the discount from the original price, Amir will pay $85.99 - $12.90 = $73.09. Now, let's calculate the sales tax. 6.5% of $73.09 is $4.75. Adding the sales tax to the discounted price, Amir will pay a total of $73.09 + $4.75 = $77.84 for the skates.