Depreciable mining equipment costing $100,000 is expected to have a useful life of 120,000 units of production. Salvage value is 0, estimated annual production for the next seven years is 30,000 units, 30,000. 20,000, then 10,000 units per year over the remaining four years. Total = 120,000 units.

A) using the depreciation method units of production determine the allowable depreciation for each of the 7 years

B) using the MACRS depreciation determine the allowable annual depreciation for each year, assuming the half year convention, ie depreciation over 8 years