Cafeteria is planning to install vending machines with a cost of $300,000. It is estimated that these vending machines will generate annual sales of 20,000 cups with a price of $10 per cup. Cash variable costs are $4 per cup while cash fixed costs are expected to be $50,000 per year. The vending machines estimated economic life would be 5 years with a salvage value of $50,000 and depreciated using the straight-line method. BANE is subject to a 35% income tax rate. REQUIREMENTS: a. Determine the payback period; b. Determine the accounting rate of return based on original investment; c. Determine the accounting rate of return based on the average investment