Question 5382
we need to find the area of the floor: 
Area = Length * Width
Area = 12*20
Area = 240 square feet 
Then convert this to yardage: 
There are 9 square feet in a yard (3 feet by 3 feet = 9 feet)
240/9 = 26.66 
Then multiply 26.66 square yards by the cost per square yard:
26.66*8.91 = $237.60 
You didn't say whether your instructor wants you to round up or not - but carpet is not sold in partial square yards, so the square yardage should be 
27 square yards * 8.91 = $240.57