Equipment is purchased for $80,000. It has an 8 year useful life and a $39000 residual value. Under the double-declining-balance method, what is the depreciation for year 3?
a. 6,000
b. 48,000
c. 11,250
d. 8436
I answered C. The teacher said it's a. 6,000. I have no idea what I'm doing wrong.