B should be the seller? The actual purchase price of Party A is 1860B, and the actual selling price of Party A is 2060B. Compared with the purchase price at the time of delivery, Party A saves 40 yuan, and Party B pays 40 yuan less than the price at the time of delivery. However, considering the storage and handling interests of Party B, 60B actually sold for more than 20 yuan. The total savings of 60/ ton in the cash transfer maturity transactions in stages A and B are 60/ ton of storage and handling interest.