please explain how you got the answers and and provide all the formulas that been used in otder to answer this question and also please explain how we get all the answers in the blue box

Compute the missing information, starting with scenario A, then for scenarios B and C. 21,500 units 140 14 Number of units Sale price per unit Variable costs per unit Contribution margin per unit Total contribution margin Contribution margin ratio 3,664 units 2,650 units 280 154 126 461,664 4,815 126 $ 2,709,000 45 % 90 % 10%