Function sln

sln(cost: number, salvage: number, life: number): number
Calculates the straight-line depreciation of an asset for one period.
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).
- life: number
  The number of periods over which the asset is depreciated (sometimes called the useful life of the asset).
Returns number
the straight-line depreciation
Example
```
sln(30000, 7500, 10); // 2250
```
- Defined in sln.js:14