“fair market price” means-

(a) the consideration of a supply determined on the basis of general relationship between a buyer and seller who are not associated with each other;

(b) where a fair market price referred tin clause (a) is not available, the consideration of any similar previous supply in the same circumstance;

(c) if fair market price cannot be determined as aforesaid, the price determined by the Board on the basis of objective average price determined under ordinary business relationship a buyer and seller who are not associated with one another;