Using the following data Chin has correctly selected the plan which will maximise profit for next month, assuming 15,000 labour hours are available. Product M Product Q per unit per unit per unit per unit Selling price 171 235 Less: Variable costs Materials 26 45 Labour (at 10 per hour) 60 80 86 125 Contribution 85 110 Maximum demand (units) 1,000 1,200 Requirement If an extra 48 hours were available (at the normal hourly rate of 10) and allocated optimally, profit for next month would be expected to increase by