This trial balance of Michels Co

This trial balance of Michels Co. does not balance.
Each of the listed accounts has a normal balance per the general ledger. An examination of the ledger and journal reveals the following errors:
1. Cash received from a customer on account was debited for $780, and Accounts Receivable was credited for the same amount. The actual collection was for $870.
2. The purchase of a printer on account for $340 was recorded as a debit to Supplies for $340 and a credit to Accounts Payable for $340.
3. Services were performed on account for a client for $900. Accounts Receivable was debited for $90 and