Afirm has determined its cost of each source of capital and its optimal capital structure which is comprised of the following sources;
long-term debt = 45%, after-tax cost = 7%
preferred stock = 15%, after-tax cost = 10%
common stock equity = 40%, after-tax cost = 14%
the weighted average cost of capital for this firm is;

10.25%

Explanation:

Data provided in the question:

Long-term debt = 45%, after-tax cost = 7%

Preferred stock = 15%, after-tax cost = 10%

Common stock equity = 40%, after-tax cost = 14%

Now,

The  weighted average cost of capital for this firm will be calculated as:

= Long term debt × after-tax cost + Preferred stock × after-tax cost + Common stock equity × after-tax cost

or

= 0.45 × 0.07 + 0.15 × 0.10 + 0.40 × 0.14

or

= 0.0315 + 0.015 + 0.056

= 0.1025

or

= 0.1025 × 100%

= 10.25%

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.