The number of units to be produced for breakeven will be windows =6400 and doors = 1600
Contribution per unit will be:
Windows = 400-250 = $150 per unit
Doors = 1000-700 = $300 $/per unit
Total contribution of a bundle = 20% 300+150 *80 % = 180 $ per unit
Break even unit will be:
= 1440000/180 $
= 8000 units
Windows =8000 * 0.8
= 6400 units
Doors = 8000 - 6400
= 1600 units
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