0 - ZOOM + Determine the following for Straight-line, 180% Declining Balance, and Activity Based depreciation. T Corporation purchased equipment for $500,000. Residual value at the end of the estimated 6 years or 43,750 hours service life is expected to be $80,000. For Straight-line: 1. Book value at the end of year 3 $ For 180% declining balance: 2. Depreciation expense for year 2 3. Depreciation expense for year 3 $_ $_ For Activity based: Year Hours used 7,300 7,410 7,400 7,200 7,150 7,290 4. Depreciation expense for year 3 $_ 5. Book value at the end of year 3 $_