On January 1, 2019, Portly Corporation acquired equipment for $136,000. The estimated life of the equipment is 10 years or 45,000 hours. The estimated residual value is $10,000. What is the balance in Accumulated Depreciation on December 31,2019 , if Portly Corporation uses the units of production method of depreciation and used the machine for 2,600 hours? Select one: a. $12,600 b. $7,280 c. $7,858 d. $27,200