At the beginning of the year, Bike World purchases new equipment for $$75,400.$ It has a useful life of $5$ years or $120,000$ units of production. Estimated Salvage Value $$2,000.$ Units consumed for the first year were $20,000,$ for second year were $50,000,$ for the third year were $30,000,$ for the fourth year were $15,000,$ and for the fifth year were $5,000.$ Find its $5$ years depreciation expense using the following methods.

straight line

units of production

double declining