On January 1, 2018, ACME Corp. purchased equipment for $60,000. It is expected to last 5 years, after which it will be sold for $5,000. It is also expected to be used for a total of 10,000 machine hours. The equipment was used for 750 hours during the year ended December 31, 2018. The depreciation expense for 2018 using the units-of-production method will be: Select one: O a. $4,125 O b. $4,500 O c. $12,250 O d. $11,000