Dexter industries purchased packaging equipment on January 8 for $768,400. The equipment was expected to have a useful life of three years, or 7500 operating hours, and a residual value of $63,400. The equipment eas used for 3,000 hours during year 1, 2325 hours in Year 2, and 2175 hours in year 3. Determine the amount pf depreciation expense for the three years ending December 31, Year1,Year2,Year 3 by the double-declining balance method. Also determine the total depreciation expense