Final answer:
Accurate financial computations for cost of equity, post-tax cost of debt, WACC, company value, and price per share require detailed information and specific formulas. Without them, it is not possible to provide numerical answers, but general methodologies for each calculation can still be outlined.
Step-by-step explanation:
The student's question involves computing various financial metrics for BHP Billiton, including the cost of equity, post-tax cost of debt, weighted average cost of capital (WACC), company value, and price per share. These calculations are based on dividend growth, debt instrument information, corporate tax rate, debt-equity ratio, and EBIT growth projections. Unfortunately, without proper formulas and detailed step-by-step calculations, it's impossible to provide accurate numerical answers to this complex financial question. However, the cost of equity can typically be estimated using the dividend discount model or the capital asset pricing model, the post-tax cost of debt is calculated by adjusting the debt's yield for the corporate tax shield, and the WACC is found by combining the cost of equity and cost of debt based on the firm's capital structure. Company value would involve discounted cash flow analysis, and price per share would depend on that valuation divided by the number of outstanding shares.