please explain how they got the answers in the yellow portion

trying to learn for exam

Practice Problems 2. Financial Statement Analysis FNCE4500 The most recent financial statements for Jaycom, Inc., follow. Sales for 2021 are projected to grow by 20 percent. Interest expense will remain constant; the tax rate and the dividend payout rate will also remain constant. Costs, other expenses, current assets, fixed assets, and accounts payable increase spontaneously with sales. If the firm is operating at full capacity and no new debt or equity is issued, what external financing is needed to support the 20 percent growth rate in sales