not to empty the salt.turn over sack and release the sugar.
cut the hole on other end as well. pour sugar when needed from one end, pour salt from the other end when needed. keep them both tied when done.
pour the salt in buyer’s sack. tie from middle. pour the sugar. cut a whole in the buyer’s sack (there is restriction on cutting whole in seller’s sack not buyer’s) and pour the salt back in seller’s sack.
1) the merchant empty sack should be putted down on the ground, and open trader sack and put the salt temporarily outside the sack while it is on the ground.
2) after pouring all salt outside 