March 3 Purchased $1,150 of merchandise froe GreenWorld Company with credit terms of 2/15, n/60, invoice dated March 3. and fog shipping point. March 4 Paid $75 cash for shipping charges on the March 3 purchase. March 5 Returned to Greenborld unacceptable merchandise that had an involce price of $150. March 18 Paid Greemborld for the March 3 purchase, net of the discount and the returned nerchandise. March 19 Purchased $425 of merchandise from Peoplefirst corporation with credit teras of 1/10, n/30, invoice dated March 19, and FoB destination. March 21 After negotiations, received from Peoplefirst a 525 allowance (for scuffed merchandise) toward the $425 owed on the March 10 purchase. March 29 sent check to Peoplefirst paying for the March 19 purchase, not of the allowance and the discount