Section 6. Undivided Shares.—

1. There may be a contract to sell or a sale of an undivided share of goods. If the parties intend to effect a present sale, the buyer, by force of the agreement, becomes an owner in common with the owner or owners of the remaining shares.

2. In the case of fungible goods, there may be a sale of an undivided share of a specific mass, though the seller purports to sell and the buyer to buy a definite number, weight or measure of the goods in the mass, and though the number, weight or measure of the goods in the mass is undetermined. By such a sale the buyer becomes owner in common of such a share of the mass as the number, weight or measure bought bears to the number, weight or measure of the mass. If the mass contains less than the number, weight or measure bought, the buyer becomes the owner of the whole mass and the seller is bound to make good the deficiency from similar goods unless a contrary intent appears.