Jumbotron Inc. had sales of $8,000 in November, $14.000 in December, and projects sales of $10,000 for January, $12,000 for February, and $8,000 for March. The firm's cost of goods sold every month is equal to 70% of the next month's sales. The firm collects its receivables in 60 days and pays its payables in 30 days. The firm begins January 1 with $10,000 in cash. All sales and purchases are on credit. What is Jumbotron's accounts payable at the end of January? $5,600 $7.000 $8.400 $9.200 $11.100