Tomko Company purchased machinery with a list price of $96,000. They were given a 10% discount by the manufacturer. They paid $600 for shipping and sales tax of $4,500. Tomko estimates that the machinery will have a useful life of 10 years and a residual value of $30,000. If Tomko uses straight-line depreciation, annual depreciation will be Select one: a. $6,150. b. $5,640 c. $6,108. d. $9,150