Find all missing letters.

A B 2,678 units (d) 200 $ 140 Number of units Sale price per unit Variable costs per unit Contribution margin per unit Total contribution margin 2,548 units (g) 2,540 (h) (a) 56 $ 90 (b) (c) 0 (e) $ 1,718,640 (1) Contribution margin ratio 50 %