4) The Melville Corporation produces three products: D1, D2, D3. Production information concerning manufacturing costs and demand are shown below: Mixing minutes per unit Selling price per unit Variable cost per unit Monthly demand in units The mixing machines are potentially the constraint in the production facility. A total of 10,900 minutes are available per month on these machines. If given the opportunity, how much would Melville be willing to pay for an additional minute of the mixing machine: A) $7.36 B) $9.67 C) $0.00 D) $5.16