The sales for October, November, and December are $10,000, $12,000, and $18,000, respectively. For any particular sales month, the company receives the following percentages over time in cash: 20% in cash from that same months sales, 50% in cash from the previous months sales, and 30% in cash from the sales from two months ago. What amount of cash will the company receive during December?

$12,600

$12,000

$9,600

$9,000