Budget information relating to a company that manufactures four products is as follows. Product Maximum sales Machine hours Maximum machine hours Sales price Material cost demand Units per unit required per unit per unit $ $ A 1,000 0.1 100 15 6 B 500 0.2 100 21 10 C 2,000 0.3 600 18 9 D 1,000 0.2 200 25 16 1,000 Only 750 machine hours are available during the period. Applying the principles of throughput accounting, how many units of Product B should be made if the company produces output to maximise throughput and profit? units