Smith Company owns 3 machines that provide 12,600 machine hours per year. Part X requires 1.5 hours, and Part Y requires 0.5 hour. The respective unit contribution margins for Part X and Y are $48 and $33. If a maximum of 15,000 units of each part can be sold, what is the maximum contribution margin? 0 a. $950,700 0 b. $685,800 0 c. $643,200 0 d. $658,200