Nov. 20 Sold two items of merchandise to Cheryl Jahn, who paid the $390 (total) sales price in cash. The goods cost Bear’s $290. 25 Sold 20 items of merchandise to Vasko Athletics at a selling price...

Nov. 20 Sold two items of merchandise to Cheryl Jahn, who paid the $390 (total) sales price in cash. The goods cost Bear’s $290.
25 Sold 20 items of merchandise to Vasko Athletics at a selling price of $3,900 (total); terms 3/10, n/30. The goods cost Bear’s $2,450.
28 Sold 10 identical items of merchandise to Nancy’s Gym at a selling price of $5,900 (total); terms 3/10, n/30. The goods cost Bear’s $3,950.
29 Nancy’s Gym returned one of the items purchased on the 28th. The item was in perfect condition and credit was given to the customer.
Dec. 6 Nancy’s Gym paid the account balance in full.
30 Vasko Athletics paid in full for the invoice of November 25.
How would I compute the net sales revenue