Written down value of block of assets: computation rules, transfer adjustments, demerger treatment, and LLP conversion. Written down value of a block of assets is computed by opening WDV, additions during the year, amounts received or receivable on disposal, and any slump sale adjustment. Special rules govern transfers between holding and subsidiary companies, amalgamation, demerger, conversion of a private or unlisted public company into an LLP, and corporatisation of a recognised stock exchange. The older provision also states that money payable is deducted even if due but not received, and actual sale price, not fair market value, is used.