9514 1404 393
Answer:
 $6,797.09
Step-by-step explanation:
The area of the floor is ...
 (21 ft)(28 ft) = 588 ft²
Then the cost of the carpet material is ...
 (588 ft²)($10.45/ft²) = $6,144.60
The subtotal with installation fee is ...
 $6,144.60 +149.00 = $6,293.60
Adding the sales tax multiplies this amount by 1 +8% = 1.08, so the final price is ...
 1.08 × $6,293.60 = $6,797.09 . . . total price