REVIEW: Use the following to answer questions 28-32 The company reports the following income statement results: Gross profit $432,630 Interest revenue 10,000 Sales discounts 5,000 Net Sales 990,000 Operating expense 300,000 Effective tax rate 20% 28. $ Calculate Sales. 29. $ 30. $ 31. 32. Calculate Income before Income tax (IBT). Calculate net income. % Calculate the gross profit margin (one decimal place) % Calculate the profit margin (two decimal places) AL