Final answer:
The company's cost of common equity if all of its equity comes from retained earnings is 16%. If the company issued new stock incurring a 10% flotation cost, the cost of equity from the new stock would be approximately 17.11%.
Step-by-step explanation:
The company's cost of common equity, when all equity comes from retained earnings, can be calculated using the Gordon Growth Model which is expressed as:
Cost of Equity = (D1 / P0) + g
where D1 is the next year's expected annual dividend, P0 is the current stock price, and g is the growth rate.
For Sons' common stock, we have:
Cost of Equity = ($3.00 / $30.00) + 0.06
Cost of Equity = 0.10 + 0.06 = 0.16, or 16%.
For part b, calculating the cost of equity from new stock, we need to adjust the price to account for the flotation cost. This can be done by multiplying the current stock price by (1 - flotation cost percentage). The adjusted cost of equity formula will then be:
Cost of New Equity = (D1 / (P0 * (1 - Flotation Cost))) + g
Cost of New Equity = ($3.00 / ($30.00 * (1 - 0.10))) + 0.06
Cost of New Equity = ($3.00 / $27.00) + 0.06 = 0.1111 + 0.06 ≈ 17.11%