Exercise 9-18 Revising depreciation rates-change in useful life and residual value LO4 The Hilton Skating Club used straight-line depreciation for a used Zamboni ice-resurfacing machine that cost $44,000, under the assumption it would have a four-year life and a $5,100 trade-in value. After two years, the club determined that the Zamboni still had three more years of remaining useful life, after which it would have an estimated $3,880 trade-in value. Required: 1. Calculate the Zambon's book value at the end of its second year. Zambones book value 4 2. Calculate the amount of depreciation to be charged during each of the remaining years in the Zamboni's revised useful life. Amount of depreciation