6.6 Input tax allocation rules.—Under section 31(2)(a) and (b) of the Act, the input tax on acquisitions directly allocable to the making of taxable supplies is deductible in full, and the input tax on acquisitions directly allocable to the making of exempt supplies is disallowed in full. Input tax on acquisitions used in making both taxable and exempt supplies (dual-purpose acquisitions) must be allocated between them in accordance with the formula A x B/C (section 31(2)(c)) ; that is, allocated in proportion to total taxable sales during the current tax period divided by total supplies in that period. For example, if during the month of August, the input tax not directly allocable to either taxable or exempt supplies is $10,000, the total taxable supplies in August are $6,000,000 and the total supplies in August are $10,000,000 the input tax allocable to taxable supplies under this formula (and therefore deductible for August) is $10,000 x 6,000,/10,000, or $6,000.