7) The following potential monthly profitability & sales opportunity information is given: Revenue Variable Cost Lamp A $53,000 $34,000 Lamp B $69,000 $28,000 Lamp C $59,000 $26,500 Units 4000 5500 4500 Also, all lamps require special processing by a single machine. Lamp A needs 1.5 hours, Lamp B needs 2.50 hours and Lamp C requires 2.25 hours of time on the machine. You cannot afford another machine. What lamp type is most profitable based on the constraint provided