Sauer Milk Inc. wants to determine the minimum cost of capital point for the firm. Assume it is considering the following financial plans:

Cost (aftertax) Weights

Plan A Debt 7.0 % 15 %

Preferred stock 14.0 10

Common equity 18.0 75

Plan B

Debt 7.5 % 25 %

Preferred stock 14.5 10

Common equity 19.0 65

Plan C

Debt 8.0 % 35 %

Preferred stock 21.7 10

Common equity 15.8 55

Plan D

Debt 15.0 % 45 %

Preferred stock 22.2 10

Common equity 17.5 45

a-1. Compute the weighted average cost for four plans. (Do not round intermediate calculations. Input your answers as a percent rounded to 2 decimal places.)