Consider a $6500 piece of machinery, with a 5-year depreciable life and an estimated $1200 salvage value. The projected utilization of the machinery when it was purchased, and its actual production to date, are as follows:

Year Projected Production (Tons) Actual Production (Tons)
1 3500 3000
2 4000 5000
3 4500 [Not]
4 5000 Yet
5 5500 [Known]

Compute the depreciation using :
a. straight line
b. sum of years digits
c. double declining balance
d. Unit of production (for the first 2 years only)
e. Modified accelerated cost recovery system