16. $ During the first two years, MOM, Inc., drove the truck 63,000 and 66,200 miles, respectively, to deliver merchandise to its customers. The company originally purchased the truck for $145,000. If the truck has an estimated life of 8 years or 400,000 miles, with an estimated residual value of $45,000, what amount of depreciation expense should MOM record in the second year using the activity-based method? 17. $ JM Corporation purchased equipment at the beginning of 2015 for $825,000. In 2015, 2016 and 2017, JM depreciated the asset on a straight-line basis with an estimated useful life of 10 years and a $80,000 residual value. What is the BOOK VALUE of the equipment at the beginning of 2018? 18. $ AD Enterprises purchased equipment for $400,000 on January 1, year 1. The equipment is expected to have a five-year life, with a residual value of $20,000 at the end of its service life. Using the double- declining balance method, determine depreciation expense for year 2. 19. $ AD Enterprises purchased equipment for $400,000 on January 1, year 1. The equipment is expected to have a five-year life, with a residual value of $20,000 at the end of its service life. Using the straight- line method, determine book value at the end of year 2