Unified Parcel, Inc., operates a local parcel delivery service. The company keeps detailed records relating to operating costs of trucks and has found that if a truck is driven 110,000 miles per year the operating cost is 7.5 cents per mile. This cost increases to 8.75 cents per mile if a truck is driven 60,000 miles per year.

Required:

Estimate the cost formula for truck operating costs using the high-low method.