assume plain ice cream company, incorporated, in ithaca, ny, bought a new ice cream production kit (pasteurizer/homogenizer, cooler, aging vat, freezer, and filling machine) at the beginning of the year at a cost of $12,000. the estimated useful life was four years, and the residual value was $960. assume that the estimated productive life of the machine was 9,200 hours. actual annual usage was 3,680 hours in year 1; 2,760 hours in year 2; 1,840 hours in year 3; and 920 hours in year 4. required: 1. complete a separate depreciation schedule for each of the alternative methods. straight-line. units-of-production. double-declining-balance.