1. Returned 20 widget product units (that were purchased on account) to the vendor who adjusted our bill

2. Sold 280 widget product units for $16 each for cash to Marsha Brady 15.

3. Sold 250 widget product units for $16 on account to Greg Brady.

4. Received $80 in advance from a customer who expects to purchase items from us in the near future .

Register every transaction in the journal Entry.