The answer is 27 , I need the calculation

C. A company has forecast sales in the first three months of the year as follows (figures in millions): January, $90, February, $20; March, $30. Seventy percent of sales are usually paid for in the month that they take place and 30 percent in the following month. Receivables at the end of December were $20 million. What are the forecasted collections on accounts receivable in March? A. $27 million B. $50 million C. $23 million D. $35 million