CoulD you please show your steps? I find this question challenging. Thank you

Version 1 26 Assume Marble is projecting a 20% increase in sales for the coming year, and that assets, all costs, and current liabilities are proportional to sales. Long-term debt is not proportional to sales. Assume the firm's tax rate remains unchanged and the dividend payout is 40%. What is the external financing needed (EFN) for 2018 ( $ in millions)? A) $64.1 B) $110.9 C) $132.3 D) $146.7 E) $152.9