Product A Product B Product C Product D Selling price per unit $42.30 $50.00 $37.60 $33.50 10 Variable manufacturing cost per unit $20.80 $30.70 $21.00 $19.90 Variable selling cost per unit $2.70 $2.10 $1.00 $2.40 Milling machine minutes per unit 3.30 4.10 2.60 1.30 Monthly demand in units 1,000 4,000 3,000 3,000 The milling machines are the constraint in the production facility. A total of 14.000 minutes is available per month on these machines. Up to how much should the company be willing to pay for one additional minute of milling machine time if the company has made the best use of the existing milling machine capacity? Multiple Choice O O 1812 $570 $4.00