Answer:
Flotation costs increase the cost of equity:
since Kuhn only receives $0.92 per every dollar of common stocks, cost of equity increases by $0.08 / $0.92 = 8.7%
cost of equity without issuing additional common stocks:
$33.35 = $2.78 / (Re - 8.7%)
Re - 8.7% = $2.78 / $33.35 = 8.34%
Re = 8.34% + 8.7% = 17.04%
since the project is going to be financed solely by issuing common stocks, its WACC = 17.04% x (1 + 8.7%) = 18.52%
if the company also issued debt or preferred stocks in order to finance this project, the project's WACC would probably decrease. Generally, equity is much more expensive than debt. That means that a project that is solely financed through equity will have a high WACC: