Novak Enterprises purchased a delivery truck on January 1, 2017, at a cost of $29, 700. The truck has a useful life of 7 years with an estimated salvage value of $6, 600. The straight-line method is used for book purposes. For tax purposes, the truck, having an MACRS class life of 7 years, is classified as 5-year property; the optional MACRS tax rate tables are used to compute depreciation. In addition, assume that for 2017 and 2018 the company has revenues of $220,000 and operating expenses (excluding depreciation) of $143,000. Compute income before income taxes for 2017 and 2018. Compute taxable income for 2017 and 2018. (Round answers to O decimal places, e.g. 45, 892.) Determine the total depreciation to be taken over the useful life of the delivery truck for both book and tax purposes