Murthy and Madhavan were partners in a firm sharing profits and losses in the ratio of 3 : 1. They admitted Shriniwas as a new partner in the firm. On admission of Shriniwas, there existed a balance of ₹8,00,000 in debtors account and a balance of ₹50,000 in provision for bad debts account. Debtors of ₹60,000 proved bad and hence were written off. It was decided to maintain a provision for bad debts at 10% of the debtors. The revaluation account will be debited by \_\_\_\_\_ on the reconstitution of the firm.