What are the formulas to compute this? I only understood Company A but B- D are confusing me! Thx.

CVP Analysis. The following table summarizes financial information for four different companies. Company A Com B Company C Company D Sales (S) Variable expenses(s) Fixed expenses (S) Operating income (loss) (S) Units sold (S) Contribution margin per unit (S) Contribution margin ratio (S) 757,500 445,000 162,500 242,400 360,000 1159,000 81,000 152.000 20,000 32.00 175,100 106,800 15,625 6.06 8.32 0.60 Fill in the missing values in the table. (12 values in all.) . Compute the breakeven, in sales dollars, for each company