Answer:
Cost of equity.
Step-by-step explanation:
In Financial accounting, Paid-in capital is one of the most essential components of the equity of a business and can be defined as the payments received in full (cash or assets) from shareholders (creditors or investors) in exchange for a company's stock. It comprises of common stock and preferred stock.
Hence, a company with no debt in its capital structure would have a weighted average cost of capital equal to its cost of equity because it doesn't have any liabilities.
The cost of equity is simply the rate of return being paid to shareholders for the risk of their investment.