(a) with respect to conventional gasoline, the mid price for the corresponding base product;

(b) with respect to E10 gasoline, the sum of the mid prices or the daily product prices, as the case may be, for each of its base products, multiplied by the relevant percentage set out in Schedule A for each base product;

(c) with respect to ultra-low sulphur diesel fuel or furnace oil, the sum of the mid prices or the daily product prices, as the case may be, for each of its base products set out in Schedule A.1 or referred to in subsection 4.1(1), as the case may be, multiplied by the relevant percentage determined by the Board for each base product.