Answer: Plain should be sold as it makes higher Contribution margin.
Step-by-step explanation:
Contribution Margin of Plain:
= Total hours constraint / Number of hours required for Plain * Contribution margin per unit
= 2,400 / 2 * 82
= $98,400
Contribution Margin of Fancy:
= 2,400 / 3 * 99
= $79,200
Plain makes more profit than Fancy and so should be the one sold.