Delta Corporation has the following capital structure:

	Cost (aftertax)			Weights			Weighted Cost
Debt (Kd)		6.1	%		30	%		1.83	%
Preferred stock (Kp)		7.6			20			1.52
Common equity (Ke) (retained earnings)		13.1			50			6.55
Weighted average cost of capital (Ka)								9.90	%

a. If the firm has $23 million in retained earnings, at what size capital structure will the firm run out of retained earnings? (Enter your answer in millions of dollars (e.g., $10 million should be entered as "10").)

Capitol structure size (X) ?