On January 3, 2002, Canyon Co. purchases a machine for $140,000. It was estimated that the machine could be used for 5 years or produce 40,000 widgets. The estimated residual value is $12,000. in 2004, the machine produced 8,000 widgets.

Required

Determine depreciation expense for 2004 under each of the following methods:

A. straight-line

B. sum-of-the-years digits

C. double-declining balance

D. units of production