1. `{:("Calculation of Loss on Sale of Boiler: ",₹),("On of Boiler","20,000"),("Less: Depreciation for 4 years (Rs 2,000+ Rs 1,800 + Rs 1,620 + Rs 1,458) " ,"6,878"),("Book value in the beginning of 5th year","13,122"),("Less: Sale proceeds ","4,000"),("Loss on Sale of Boiler ","9,122"):}`
It is assumed that in the beginning of the 5th year boiler became useless on account of damage to some of its vital parts.
2. Calculation of Depreciation for 5th year:
Balance of remaining machinery (Book Value) in the beginning of 5th year
= Rs 1,31,220-Rs 13,122 (Book Value of Boiler) = Rs 1,18,098
Hence, Ddepreciation for the 5th year `"@ " 10%`= Rs 11,810 (to the nearest rupee).