Sports World purchased equipment costing $ 72,000. The equipment has a residual value of $ 8000 and an estimated useful life of 4 years. Calculate annual amortization using the straight-line method 1. $ Year 1 2 3 4 Equipment 72000 72000 72000 72000 Acc. Depreciation a$ b$ c$ d$ Book Value e$ f$ g$ h$ Blank 1: Blank 2: Blank 3: Blank 4: Blank 5: Blank 6: Blank 7: Blank 8: Blank 9: