2. On January 1, 2017, Boone Company purchased a machine for $75.000 that had a 6-yeat life and a residual value of $6,000. After 3 years of use, on January 1, 2020. Boone Company paid $7,500 to improve the efficiency of the machine. The effect of the expenditure was to increase the productivity of the machine without increasing its remaining useful life or changing its residual value Boone uses straight line depreciation a)What account should be debited in recording the $7,500 expenditure? b) What amount of depreciation expense should be reported for 2020? I bility: Good to go I o