Ddb Example:

You have purchased an office machine for $8,000. The useful life of this machine is six years. The salvage value after six years is $900. You want to compute the depreciate expense for the fourth year, using the double-declining balance method.

Memory register usage:

Register 0: 8000 (amount paid for asset) Register 1: 900 (value of asset at end of its life) Register 2: 6 (useful life of the asset) Register 3: 4 (time period for depreciation allowance)

Clicking SELECT on Ddb returns 790.12, which tells you that the depreciation expense for the fourth year will be $790.12.