Seduak

Seduak has estimated the costs of debt and equity capital for various proportions of debt in its capital structure.

% Debt After-tax cost of debt Cost of equity
0% – 13.0%
10 5.4% 13.3
20 5.4 13.8
30 5.8 14.4
40 6.3 15.2
50 7.0 16.0
60 8.2 17.0

Based on these estimates, determine Seduakā€™s optimal capital structure