please answer this question

Selling price $180 $120 Direct materials 58 54 Direct labour ($8 per hour) 164 24 Other Variable costs 16 6 Total variable costs 138 84 Contribution margin $42 $36 Contribution margin ratio 23% 30% What is the contribution margin per hour for Product A $ 9 What is the contribution margin per hour for Product B $ Assume that HSE is able to free up an additional 2,000 hour and wishes to maximize its income. Of the additional units it produces, at least 100 of each product are necessary for sales. How many units of product A should be produced? units How many units of product 3 should be produced? units