Help asap the question is from the lion the witch and the wardrobe How has Edmund’s attitude changed from the beginning of the story to the point where the sledge got stuck in the mud and slush?​

Assume the perpetual inventory method is used. 1) the company purchased $12,500 of merchandise on account under terms 2/10, n/30. 2) the company returned $1,200 of merchandise to the supplier before payment was made. 3) the liability was paid within the discount period. 4) all of the merchandise purchased was sold for $18,800 cash. what effect will the return of merchandise to the supplier have on the accounting equation?