Spring, Inc. manufactures two products. It currently has 2,250 hours of direct labor and 3,750 hours of machine time available per month. The table below lists the contribution margin, labor and machine time requirements, and demand for each product. Unit contribution margin Demand Labor time Machine time Product A Product B $28.00 $21.00 3,000 units 1,500 units 1/2 hour 1/2 hour 1 hour 1/2 hour How much of each product should Spring manufacture per month? Multiple Choice O units of A and 3,800 units of B 3.000 units of A and 1,000 units of B 3,000 units of A and 2,000 units of B 3,000 units of A and O units of B