Eco Plastics Company Since its inception, Eco Plastics Company has been revolutionizing plastic and trying to do its part to save the environment. Eco's founder, Marion Cosby, developed a biodegradable plastic that her company is marketing to manufacturing companies throughout the southeastern United States. After operating as a private company for 6 years, Eco went public in 2012 and is listed on the Nasdaq stock exchange. As the chief financial officer of a young company with lots of investment opportunities, Eco's CFO closely monitors the firm's cost of capital. The CFO keeps tabs on each of the individual costs of Eco's three main financing sources: long-term debt, preferred stock, and common stock. The target capital structure for Eco is given by the weights in the following table: Source of capital Weight Long-term debt 30% Preferred stock 20 Common stock equity 50 Total 100%