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

Plan A
Debt		7.0	%		20	%
Preferred stock		14.0			10
Common equity		18.0			70
Plan B
Debt		7.5	%		30	%
Preferred stock		14.5			10
Common equity		19.0			60
Plan C
Debt		8.0	%		40	%
Preferred stock		14.7			10
Common equity		10.8			50
Plan D
Debt		10.0	%		50	%
Preferred stock		15.2			10
Common equity		12.5			40

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.)

a-2. Which of the four plans has the lowest weighted average cost of capital?