Underwood, Inc. manufactures two products. It currently has 2.500 hours of direct labor and 1,000 hours of machine time available per table below lists the contribution margin, labor and machine time requirements, and demand for each product Product A Unit contribution margin $32.00 Product B $30.00 Demand 1,800 units 900 units Labor time 1/5 hour 3/4 hour Machine time 1 hour 3/4 hour What is the contribution margin per machine hour for Product B