I need to post to General Ledger the following:

21 Billed customers for cleaning offices $670

29 Received $300 from the cusomters billed on the 21

How do I post these?

21 Billed customers for cleaning offices $670

dr. Accounts Receivable 670
Cr. Cleaning Revenue 670

29 Received $300 from the cusomters billed on the 21

dr. Cash 300
Cr. Accounts Receivable 300