Dexter Industries curchesed pockaging equipment on lanuary \& fo $516,200. The equipment was expected to bave a useful life of four years, or 6,400 operating hours, and a relidu value of 142,600 The equipment was used for 2,240 hours dunng Year 1,1,344 hours in year 2,1,792 hours in Year 3 , and 1,024 hours in year 4 , Required: 1. Determne the amount of depreciabon expense for the four years ending December 31 by (a) the straight-line methof, (b) the units-of-activity method, and (c) the coublet dectining balance wethod. Also determine the total deprecition expense for the four years by each method. Round the answer for each year to the nearest whole dollar