Solve the Linear Programming Problem $\$ 40,000$ In Corporate and Municipal Bonds

Solve the linear programming problem.
-Zach is planning to invest up to $\$ 40,000$ in corporate and municipal bonds. The least he will invest in corporate bonds is $\$ 8000$ and he does not want to invest more than $\$ 25,000$ in corporate bonds. He also does not want to invest more than $\$ 33,621$ in municipal bonds. The interest is $8.6 \%$ on corporate bonds and $6.3 \%$ on municipal bonds. This is simple interest for one year. What is the maximum income?

A) $\$ 28,095$
B) $\$ 18,095$
C) $\$ 3095$
D) $\$ 11,205$