The Crane Clinic purchased a new surgical laser for $75,600. The estimated salvage value is $3,600. The laser has a useful life of five years and the clinic expects to use it for 8,000 hours. It was used 1,440 hours in year 1;1,890 hours in year 2;2,160 hours in year 3 ; 1,710 hours in year 4;1,800 hours in year 5 . (a) Compute the annual depreciation for each of the five years under each of the following methods: (1) straight-line. (2) units-of-activity. (Round answers to 0 decimal place, e.g. 1500.)