The table below shows data for each of the products (A, B, C, and D) produced by the US Steel Foundry Company in its single facility Selling price per unit Variable manufacturing cost per unit Variable selling cost per unit Stamping machine minutes per unit Monthly demand in units Products A B C D $42.30 $50.00 $37.60 $33.50 $20.80 $30.70 $21.00 $19.90 $ 2.70 $ 2.10 $ 1.00 $ 2.40 3.30 4.10 2.60 1.30 1,000 4,000 3,000 3,000 US Steel is concerned that the stamping machines represent a constraint in the foundry. The total available minutes per month for the combined machines is 28,200 minutes. How many minutes of stamping machine time would US Steel need in order to satisfy demand for all four products? ULIC CHILE 28.200 2.500 31,400