Db(
Cost: Double;
Salvage: Double;
Life: Double;
Period: Double;
Month: Integer): Double;
| Parameters | Description | Constraints |
| Cost | The initial cost of the asset. | Cannot be negative. |
| Salvage | Value of an asset at the end of the depreciation period. | Must belong to the [0;Cost] interval. |
| Life | The number of the asset's depreciation periods. | Must be positive. |
| Period | The period, for which depreciation has to be calculated. The period must be measured in the same units as Life. | Must be in the [1;Life] interval |
| Month | The number of months in the first year. | Must be in the [1;12] interval |
The Db method returns depreciation of an asset for the specified period, calculated using the fixed reduction of the remainder method.
To calculate depreciation for a period, the method uses the following formulas:
(Cost - total depreciation for previous periods) * Rate,
where:
A special case is depreciation for the fist and last periods.
For the first period Db uses this formula:
Cost * Rate * Month/12
For the last period Db uses this formula:
((Cost - total depreciation for previous periods) * Rate * (12 - Month))/12.
To execute the example, add a link to the MathFin system assembly.
Sub UserProc;
Var
r: Double;
Begin
r := Finance.Db(54000, 1200, 24, 6, 7);
Debug.WriteLine(r);
End Sub UserProc;
After executing the example the console window displays the depreciation value equal to 3842.1312.
See also: