Must be solved on excel with steps for calculations.

80 130 Previous Years Sales Costs Tax rate Assets Current Assets Cash Debtors Inventory 1100 Retained Earnings 800 Dividends 0.3 Liabilities/Equity Current Liabilities 400 Creditors Short Term Notes Non-Current Assets 500 PP&E Total Assets Non-Current Liabilities 600 Debentures 1000 Owners' Equity Retained Profits Ordinary Shares 500 1000 a) Given an expected increase in sales of 13%, what is the amount of external funding required? b) At this growth rate what is the addition to retained earnings? c) Calculate the Sustainable Growth Rate (SGR) d) At the SGR what external funding is required? e) What would be the growth rate at which no external financing would be required