The following transactions relate to Gordon's business for the month of July 2011:
1. Bought goods on credit from Watson.
2. Sold some goods for cash.
3. Sold some goods on credit to Moon.
4. Sent a cheque for half the amount owing to Watson.
5. Watson grants Gordon a cash discount.
6. Moon settles most of his account in cash.
7. Gordon allows Moon a cash discount that covers the small amount owed by Moon.
8. Gordon purchases some goods for cash.

Required:
State which account in Gordon's books of accounts should be debited and which account should be credited for each transaction.