65. The consideration for a supply of the taxable portion of a tour package, where the supply is made by any person other than the first supplier of the package, is deemed to be the amount determined by the formula
A × B.
For the purposes of this formula,(1) A is the percentage that the consideration for the supply to the person of the taxable portion of the package is of the total consideration paid or payable by the person for the entire tour package; and
(2) B is the total consideration paid or payable to the person for the entire tour package.