39.2. Where, in the course of operating a feedlot that is a farming business within the meaning of the Taxation Act (chapter I-3), a person makes a supply of a service and the consideration for the supply (in this section referred to as the “total charge”) includes a particular amount that is identified in the invoice or agreement in writing for the supply as being attributable to feed,(1) the provision of the feed is deemed to be a supply separate from the supply of the service and not to be incidental to the provision of any other property or service;
(2) the portion, not exceeding 90%, of the total charge that is reasonably attributable to the feed and is included in the particular amount is deemed to be the consideration for the supply of the feed; and
(3) the difference between the total charge and the consideration for the supply of the feed is deemed to be the consideration for the supply of the service.