31 (1) Subject to the provisions of sub-rule (2), amount of reverse input tax credit shall be computed on the basis of actual purchase price of goods, on which tax has been paid.

(2) Where actual purchase price of goods is not ascertainable, purchase price, for the purpose of computing reverse amount of input tax credit, of goods which have been in respect of goods purchased from within the State immediately before the date of event giving rise to reverse input tax credit .