Depreciable cost of an asset is equal to its cost (as calculated in point 7.5.1 above) less net residual value (as calculated in point 7.5.2,) Hence, in the above example, the depreciable cost of machine is Rs. 45,000 (i.e., Rs. 50,000 - Rs. 5,000.) It is the depreciable cost, which is distributed and charged as depreciation expense over the estimated useful life of the asset.
In the above example, Rs. 45,000 shall be charged as depreciation over a period of 10 years. It is important to mention here that total amount of depreciation charged over the useful life of the asset must be equal to the depreciable cost. If total amount of depreciation charged is less than the depreciable cost then the capital expenditure is under recovered. It violates the principle of proper matching of revenue and expense.