... sources of funds equal to the uses PRO FORMA INCOME STATEMENT Sales Costs Net income $ 1, 320 1,100 $ 22 0 PRO FORMA BALANCE SHEET Assets $2, 200 Total $2, 200 Debt Equity Total $ 880 1, 320 $ 2, 200 Financial ... $190, 728 × 1.05 = $20 0 ,26 4 in the second year, $190, 728 × 1.0 52 = $21 0 ,27 8 in the third year, and so on 17 The quarterly rate is 8/4 = percent The effective annual rate is (1. 02) 4 – = 0 824 , or 8 .24 ... is 12 years, then (1 + r) 12 = 2, which implies that + r = 21 / 12 = 1.0595, or r = 5.95 percent The Rule of 72 would imply that a doubling time of 12 years is consistent with an interest rate of...