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16. $ During the first two years, MOM, Inc., drove the truck 57,200 and 52,400 miles, respectively, to deliver merchandise to its customers. The company originally purchased the truck for $153,200. If the truck has an estimated life of 6 years or 300,000 miles, with an estimated residual value of $45,200, what amount of depreciation expense should MOM record in the second year using the activity-based method? 17. $ TA Corporation purchased equipment at the beginning of year 1 for $380,000. In years 1 - 4, TA depreciated the asset on a straight-line basis with an estimated useful life of 8 years and a $40,000 residual value. What is the book value of the equipment at the end of year 4? 18. $ AD Enterprises purchased equipment for $400,000 on January 1, Year 1. The equipment is expected to have a eight-year life, with a residual value of $30,000 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 eight-year life, with a residual value of $30,000 at the end of its service life. Using the straight-line method, determine book value at the end of Year 2