need all calculations and workings

3) Upton Computers makes bulk purchases of small computers, stocks them in conveniently located warehouses, ships them to its chain of retail stores, and has a staff to advise customers and help them set up their new computers. Upton's balance sheet as of December 31, 2010, is shown here: Cash Receivables Inventories Total current assets Net fixed assets $3,500 26,000 58,000 $87,500 35,000 Accounts payable Notes payable Accruals Total current liabilities Mortgage loan Common stock Retained earnings Total liabilities and equity $9,000 18,000 8,500 $35,500 6,000 15,000 66,000 $122,500 Total assets $122.500 Sales for 2010 were $350,000 and net income for the year was $10.500, and Upton paid dividends of $4,200 to common stockholders. Its tax rate is 40%, and it operated at full capacity. Assume that all assets/sales ratios, spontaneous liabilities/sales ratios, the profit margin, and the payout ratio remain constant in 2011. a) If sales are projected to increase by $70,000, or 20%, during 2011, use the AFN equation to determine Upton's projected external capital requirements. b) Using the AFN equation, determine Upton's sustainable growth rate. That is, what is the maximum growth rate the firm can achieve without having to employ external funds? c) Forecast Upton's balance sheet for December 31, 2011. Assume that all additional external capital is raised as notes payable at the end of the year and no additional long-term loan is taken nor any equity issued