how were these answers found

On September 10th Capulet Company sold merchandise to Montagu Company. The price of the merchandise was $31 per unit for 3,000 units, the cost was $21 per unit and the terms were 2/10, n/30, FOB destination. Transportation charges were $900 and were paid in cash by the responsible party on September 10th. On September 16th Montagu returned 500 units to Capulet from the September 10th purchase. Capulet put the units back into its inventory. On September 20th Montagu paid Capulet for the purchase. In the space below, record the above transactions from Capulet's perspective. HTML Editora - I E33X X V TV TTT 12pt 9/10 A/R Sales 9/10 CGS Inventory 9/10 Delivery Expense Cash 93,000 93,000 63,000 63,000 900 900 15.500 9/16 Sales Ret & Allow 15,500 A/R 9/16 Inventory 10,500 CGS 10,500 9/20 Cash Sales Discounts A/R 75,950 1,550 77,500