of tax paid by a manufacturer in respect of purchases made on or after the 15th July 1962 : In assessing the amount of tax payable in respect of any period by a Registered dealer who manufactures taxable goods for sale or export* (hereinafter in this rule referred to as the ``manufacturing dealer ' '), the Commissioner shall, in respect of the purchases made by such dealer on or after the 15th July, 1962 of any goods specified in Schedule B, C, D, or E and used by him within the State in the manufacture of taxable goods (**) which have in fact been sold by him (and not given away as samples or otherwise) or which have been exported by him or used by him in the packing of goods so manufactured grant him a draw back, set off or, as the case may be, a refund of the aggregate of the following sums, that is to say: (a) a sum recovered from the manufacturing dealer by other Registered Dealers by way of sales tax, or general sales tax, as the case may be, both, on the purchase by him from such registered dealers, when the manufacturing dealer did not hold a Recognition or when he held a recognition but effected the * The words ``or export ' 'were inserted by a notification dated 31.8.70.