17. MACRS and Averaging Conventions. (Obj. 1) Jan purchased the following properties during 2021. Description New Computer Used Machinery Used Office building New Equipment Date Placed in Service March 9, 2021 July 17, 2021 September 6, 2021 December 27, 2021 Cost $ 6,000 70,000 270,000 84,000 Compute Jan's depreciation for each of these properties for 2021 and 2022. Assume that Jan elected to expense 50% of the cost of each item of qualified property and elected out of bonus depreciation. The machine and equipment are 7-year property.