P Part 4. the cost of capital (WACC) f company with million capital. 30% Calculate WACC for Upton Umbrellas. The company has a cost of equity of 12.8 percent, the YTM on the company's bonds is 5.5% percent, and the tax rate is 21 percent. The company's bonds sell for $1044. The debt has a book value of $444,000 and total assets have a book valu of $964,000. If the market-to-book ratio is 3.10 times.