单选题 Fairless Loan Co. offers small business and home equity loans. The firm wants to determine the optimal mix of loans that will maximize its profit. The average business loan (B) is $200,000, requires 16 hours of analysis time, and results in a contribution margin of $5,000. The average home equity loan (H) is $50,000, requires 8 hours of analysis time, and results in a contribution margin of $2,000. Fairless can obtain capital to fund up to $30 million in loans each year. The Fairless work force has up to 4,000 hours per year available for loan analysis. If Fairless uses linear programming to perform this analysis, what is the objective function it should use?