The following selected transactions were completed during October of the current year: 1. Billed customers for fees earned, $51,580. 2. Purchased supplies on account, $2,220. 3. Received cash from customers on account, $48,490. 4. Paid creditors on account, $1,340. a. Journalize these transactions in a two-column journal, using the appropriate number to identify the transactions. Journal entry explanations may be omitted. If an amount box does not require an entry, leave it blank. (1) (2) (3) (4)