Answer:
The 5% sales tax on $87.50 is $4.35, and the total amount is $91.85.
Explanation:
To find the 5% sales tax on $87.50, multiply $87.50 by 0.05, obtaining
$4.35. The total amount due, including this tax, is then $87.50 + $4.35, or $91.85.
The other problems are done in precisely the same way.