Cost & Sources of Capital

Cost & Sources of Capital
respond to the following:
Why do firms calculate their weighted average cost of capital?
In computing the cost of capital, which sources should be considered?
How does a firm’s tax rate affect its cost of capital? What is the effect of the flotation costs associated with a new security issue on a firm’s weighted average cost of capital?
Can Grammy’s Legacy engage in capital budgeting and honor God? Integrate one verse or short-passage of scripture into your answer.