Briefly describe the straight-line, Accelerated and Units of Product Method of deprecation.

At the beginning of year-1, a company buys a box manufacturing equipment for $ 2300.Estimated residual value : $ 100 and estimated useful life : 4 years. Total estimated productive capacity: 800 boxes. Production in year 1, 2,3 and 4 : 200, 300,200, 100 boxes respectively.

Using these information, calculate Deprecation Expenses for 2^nd and 3^rd year using straight-line, Double Declining Balance and Unit of Production Methods.