Function ddb

ddb(
    cost: number,
    salvage: number,
    life: number,
    period: number,
    factor?: number,
): number
Calculates the depreciation of an asset for a specified period using the double-declining balance method or some other method you specify.

Remarks:
- The double-declining balance method computes depreciation at an accelerated rate. Depreciation is highest in the first period and decreases in successive periods. This function uses the following formula to calculate depreciation for a period: Min( (cost - total depreciation from prior periods) * (factor/life), (cost - salvage - total depreciation from prior periods) )
- Change factor if you do not want to use the double-declining balance method.
Parameters
- cost: number
  The initial cost of the asset.
- salvage: number
  The value at the end of the depreciation (sometimes called the salvage value of the asset). This value can be 0.
- life: number
  The number of periods over which the asset is depreciated (sometimes called the useful life of the asset).
- period: number
  The period for which you want to calculate the depreciation. Period must use the same units as life.
- Optionalfactor: number = 2
  The rate at which the balance declines. If factor is omitted, it is assumed to be 2 (the double-declining balance method).
Returns number
the depreciation
Throws
When period is outside the valid range.
Example
```
ddb(2400, 300, 10 * 365, 1); // 1.31506849
```
- Defined in ddb.js:31