The following account balances are taken from the December 31, 2020, financial statements of ABZ Advertising Company. The company uses accounting Advertising Revenue 540,482 Cash 41.516 Accounts Receivable 7,206 Interest Expense 2,200 Accounts Payable 5,000 Operating Expenses 37,460 Deferred Revenue i 1,178 Equipment 18.048 Income Tax Expense 2,326 The following activities occurred in 2021: 1. Performed advertising services on account, $55,000. 2. Received cash payments on account, $10,400. 3. Received deposits from customers for advertising services to be performed in 2022, $2,500. 4. Made payments to suppliers on account, $5,000. 5. Incurred $45,000 of operating expenses; $39,000 was paid in cash and $6,000 was on account and unpaid as of the end of the year. What is the balance of Accounts Receivable at December 31, 2021? Oa. $55,000 Ob. $51,896. Oc. $54,396 Od. $44,600. Oe. None of the above.