(1) The amount on which tax is chargeable by virtue of section 3(a) or (c) shall, subject to this Chapter, be the total consideration which the person supplying goods or services becomes entitled to receive in respect of or in relation to such supply of goods or services, including all taxes, commissions, costs and charges whatsoever, but not including value-added tax chargeable in respect of that supply.

(2) The amount on which tax is chargeable on the intra-Community acquisition of goods by virtue of section 3(d) or (e) shall, subject to this Chapter, be the total consideration, including all taxes, commissions, costs and charges whatsoever, but not including value-added tax chargeable in respect of that acquisition.

(3) Where the consideration referred to in subsection (1) or (2) does not consist of or does not consist wholly of an amount of money, the amount on which tax is chargeable shall be the total amount of money which might reasonably be expected to be charged if the consideration consisted entirely of an amount of money equal to the open market price.