Please provide a written out by hand solution for the above example.

Use the following method to calculate the yearly depreciation allowances and book values for a firm that has purchased $150,000 worth of office equipment that qualifies as depreciation property. The equipment is estimated to have a salvage (market) value of $30,000 (20% of the original cost) after the end of its 10-year depreciable life. a. Straight line b. MACRS c. Sum-of-Years' Digits