University Car Wash built a deluxe car wash across the street from campus. The new machines cost $270,000 including installation. The company estimates that the equipment will have a residual value of $24,000. University Car Wash also estimates it will use the machine for six years or about 12,000 total hours. Actual use per year was as follows:

YearHours Used13,10021,10031,20042,80052,60061,200

what is the depreciation expense, accumlulated depreciation, and book value.

i am unable to figure out the formula.