Problem:

Phillips Equipment has 80,000 bonds outstanding that are selling at par. Bonds with similar characteristics are yielding 7.5 percent. The company also has 750,000 shares of 7 percent preferred stock and 2.5 million shares of common stock outstanding. The preferred stock sells for $65 a share. The common stock has a beta of 1.34 and sells for $42 a share. The U.S. Treasury bill is yielding 2.8 percent and the return on the market is 11.2 percent. The corporate tax rate is 38 percent.

Required:

Question: What is the firm's weighted average cost of capital?

Note: Please provide reasons to support your answer.