The financial statements of Eagle Sport Supply are shown in the following table: <image 1>. For simplicity, 'Costs' include interest. Assume that Eagle's assets are proportional to its sales. Find Eagle's required external funds if it maintains a dividend payout ratio of 50% and plans a growth rate of 15% in 2020.
['$152.5', '$162.5', '$172.5', '$182.5']