EXERCISE 2-12 Cost Behavior; High-Low Method [LO3, L04 Speedy Parcel Service operates a fleet of delivery trucks in a large metropolitan area. A careful study by the company's cost analyst has determined that if a truck is driven 120,000 miles during a year, the average operating cost is 11.6 cents per mile. If a truck is driven only 80,000 miles during a year, the average operating cost increases to 13.6 cents per mile. Required: 1. Using the high-low method, estimate the variable and fixed cost elements of the annual cost of truck operation. 2. Express the variable and fixed costs in the form Y- a+ bX. 3. If a truck were driven 100,000 miles during a year, what total cost would you expect to be incurred