The sales for October, November and December are $10,000, $12,000 and $18,000, respectively. For any particular month of sales, the following percentages are received over time in cash: 20% in cash from that same month of sales; 50% in cash from the previous month's sales; and, 30% in cash from the sales from two months ago. What amount of cash will be received during December?
A-$9,000
B-$12,600
C-$12,000
D-$9,600