SumofYearsDigits Method (DIGITS)

Compute the depreciation for an asset using the sumofyearsdigits method. 
 syse.digits(cost: ndarray, salvage_value: ndarray, useful_life: int) ndarray
Compute the depreciation for an asset using the sumofyearsdigits method.
 Parameters:
cost (np.ndarray) – The cost of the asset.
salvage_value (np.ndarray) – The salvage value of the asset.
useful_life (int) – The useful life of the asset.
 Returns:
The depreciation for the asset.
 Return type:
np.ndarray
Note
The function takes as input the cost of the asset, the salvage_value of the asset at the end of its useful life, and the useful_life of the asset in years. It computes the depreciation for the asset using the sumofyearsdigits method, which assumes that the asset depreciates more rapidly in the earlier years of its life.
Examples:
Suppose a company purchases a machine for $60,000, with an expected salvage value of $6,000 after 6 years. The company expects to use the machine for 6 years. We can compute the accumulated depreciation for the machine using the digits function:
cost= 60000 salvage_value= 6000 useful_life= 6 syse.digits(cost, salvage_value, useful_life) Output = 54000
This means that the accumulated depreciation is $54,000 and the book value of the machine will be $6,000, which is the expected salvage value.