Returns the depreciation of an asset for a specified period using the sum of years digits method.

**Sample Usage**

SYD(100,50,10,2)

SYD(A2,A3,A4,1)

**Syntax**

SYD(cost, salvage, life, period)

- cost - The initial cost of the asset.

- salvage - The value at the end of the depreciation.
- life - The number of periods over which the asset is depreciated.
- period - Period for which to calculate the depreciation.

**Examples**

SYD(100,50,10,2) returns the depreciation allowance for the second year.

**Notes**

- life and period must be measured in the same units.