An airline is considering two types of engine systems for use in its planes. Each has the same life and the same maintenance and repair record. System A costs $120,000 and uses 44,000 gallons per 1,000 hours of operation at the average load encountered in passenger service. System B costs $220,000 and uses 26,000 gallons per 1,000 hours of operation at the same level. Both engine systems have three-year lives before any major overhaul is required. On the basis of the initial investment, the systems have 9% salvage values. If jet fuel costs $2.21 a gallon (year 1) and fuel consumption is expected to increase at the rate of 7% per year because of degrading engine efficiency, which engine system should the firm install? Assume 5,000 hours of operation per year and a MARR of 6%. Use the AE criterion. What is the equivalent operating cost per hour for each engine? Assume an end-of-year convention for the fuel cost. Click the icon to view the interest factors for discrete compounding when MARR = 6% per year