Cerebro Manufacturing produces four types of structural support fittings-plugs, rails, rivets, and clips which are machined on two CNC machining centers. The machining centers have a capacity of 250,000 minutes per year. The gross margin per unit and machining requirements are shown in the spreadsheet below. A B D E F 1 Cerebro Manufacturing Model 2 3 Product Plugs Rails Rivets Clips Machine Capacity (mins./year) 4 $0.40 $1.20 $0.80 $1.10 Gross margin/unit Minutes/unit 5 1 2 3 1.5 250,000 6 Gross margin/minute Maximum production Profit 7 8 What is the gross margin per minute of rivets manufactured? OA) $0.60 OB) S 0.73 OC) 50.40 OD) $0.27