I need help.

Comparing Three Depreciation Methods Dexter Industries purchased packaging equipment on January 8 for $668,800. The equipment was expected to have a useful life of four years, or 10,400 operating hours, and a residual value of $55,200. The equipment was used for 3,640 hours during Year 1, 2,184 hours in Year 2, 2,912 hours in Year 3, and 1,664 hours in Year 4. Required: 1. Determine the amount of depreciation expense for the three years ending December 31 by (a) the stmighteline method, (b) the unitseofeactivity method, and (c) the double, declining-balance method. Also determine the total depreciation expense for the four years by each method. Round the answer for each year to the nearest whole dollar. Depreciation Expense Units-of-Activity Double-Declining- Method Balance Method _ $3 x Yearz $_ J $:] 1 Years $_ 4 $:] * 44:] mm $_ v' $:l X Total $_ v' 4:: 14:] Year Straight-Line Method