Answer:
-24
Step-by-step explanation:

The answer is 5/6, 4/5, and 3/12. All you needed to do was change the fraction into decimals.
$18,617.75 is the answer
$87,525-$77,100=$10,425 (the amount over $77,100)
$10,425 x .28=$2,919 (the 28% taxed amount over $77,100)
$2,919+$15,698.75 (the already taxed amount in the chart)=$18,617.75
C. The total area of the patio.
If you don't know the area you can't know how many bricks you need.