Answer:
The company should be willing to pay for the least profitable product (TC) which is $12.4/minute
Explanation:
                             TC        GL       NG
Contribution margin / unit        $99.2    $129.22   $95.76
(Selling price-Variable costs)
Contribution margin/minute      $12.4     $18.2       $12.6
(Contribution margin/Minutes
on the constraint)
Conclusion: Hence, the company should be willing to pay for the least profitable product (TC) which is $12.4/minute
Working
Contribution margin / unit = Selling price-Variable costs
TC= $494.4 - $395.2 = $99.2
GL= $449.43-$320.21 = $129.22
NG= $469.68-$373.92 = $95.76
Contribution margin/minute
TC= $99.2 / 8 =$12.4
GL= $129.22/7.1 =$18.2
NG= $95.76/7.60 =$12.6