Swiftly delivery service purchased a truck at a cost of 67,000 before placing the truck in service. swifly spent 2,200 painting it 500 replacing tires and 5,000 overhauling the engine. truck will remain in service for 6 years and have a residual value of 14,700. Annual mileage is expected to be 15,000 miles in each of the first 4 years and 10,000 miles in each of the next 2 years. 80,000 miles in total. Demonstrate straight line method, units of production method and double declining balance.