Jumbotron Inc

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 cash balance at the end of February?

A) $12,000
B) $13,600
C) $14,200
D) $16,600
E) $18,100