(26)"Sale price" means the amount of valuable consideration received or receivable by a dealer for the sale of any goods less any sum allowed as cash discount, according to the practice normally prevailing in the trade, but inclusive of any sum charged for anything done by the dealer in respect of the goods or services at the time of or before delivery thereof, excise duty, special excise duty or any other duty or taxes except the tax imposed under this Act and 'purchase price' means the amount of valuable consideration paid or payable by a dealer on purchase of taxable goods as mentioned in schedule VIII.

Explanation 1: -For the purpose of this clause ' sale price' includes, -

a) in relation to the transfer of property in goods (whether as goods or in some other form) involved in the execution of works contract, such amount as is arrived at by deducting from the amount of valuable consideration paid or payable to a person for the execution of such works contract, the amount representing labour and other charge incurred and profit occurred not in connection with transfer of property in goods for such execution;

b) in respect to transfer of the right to use any goods for any purpose (whether or not for a specified period), the valuable consideration received or receivable for such transfer.

Explanation 2 :-

For the purpose of this clause purchase price includes, -

(a) anything done by the seller with or in respect of the goods at the time of or before delivery thereof and

(b) containers or other materials for the packing such goods;