The Cole Company started operations this month and had the following transactions: 1 Owners invested $20,000 to start company 3 Purchased $300 of supplies 9 Completed $1,900 of services for a customer on account 15 Received $500 from customers for services in advance 25 Received $900 from customers on account 30 Unpaid employee payroll totaled $1,200 At the end of the month, $80 of supplies were on still hand. What are the company's total assets at the end of the month? 22,180 (with margin: 0)