As the revenue, cost of goods sold and other operating costs stay the same, what could be the shorter alternative for calculating the incremental cash flow?

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Lynda's Fruit Company located in Victoria is considering the purchase of a new fleet of trucks to be used in the delivery of fruit and vegetables. If it goes through with the purchase it will spend $400,000 on eight trucks. The new vehicles will be kept for 5 years, during which time they will be depreciated toward a $40,000 salvage value using straight line depreciation. They are expected to have a market value equal to their salvage value in 5 years. The new trucks will be used to replace the company's older fleet of 8 trucks, which are fully depreciated but can be sold for an estimated $20,000. Because the vehicles have a current book value of zero, the selling price is fully taxable at the firm's 30% tax rate. The existing fleet is expected to be usable for 5 more years, after which time the vehicles will have no salvage value. The existing fleet uses $200,000 per year in diesel fuel, whereas the new, more efficient fleet will use only $150,000. In addition, the new fleet will be covered under warranty, so the maintenance costs per year are expected to be only $12,000 compared to $35,000 for the existing fleet. Revenue, cost of goods sold and other operating expenses remain the same at $1,000,000, $300,000 and $100,000 respectively. 1) What is the initial outlay required to replace the existing fleet with the newer fleet? 2) What are incremental operating cash flow savings per year during years 1 to 5 for the new fleet? 3) Sketch a timeline for the replacement project cash flows for years 0 to 5. 4) If Lynda's requires a 15% discount rate for the new investments, should the fleet be replaced? 5) If the discount rate decreases, would the fleet be replaced? Give an example. Hint: This is an openended question, you may have different but correct answers. 6) As the revenue, cost of goods sold and other operating costs stay the same, what could be the shorter alternative for calculating the incremental cash flow