15. Salvino industices puchased a piece of equipment on January 1, 2015 fo $42.750. At time of prchase, the lequpment yous estimated to hace a life of 4 yeas and residual value of $3,350. on January 1, 2017, Salvino determined that the equipment had a total useful life of a years Canother 7 years lett) and a residual value of $7,500. If Saluno uses the straight-line method of depreciation what will be the depreciates expense for machine in 2017? 323,050 $3, 293 o $9,850 d) none