Funding Source: Bonds - Balance Sheet Values 4000000 - Financing After Tax Costs 4.9% | Funding Source: Preferred Stock - Balance Sheet Values 800000 - Financing After Tax Costs 9% | Funding Source: Common Stock - Balance Sheet Values 8000000 - Financing After Tax Costs 14.5% | Funding Source: Retained Earnings - Balance Sheet Values 11000000 - Financing After Tax Costs 12.3% | Based on the information provided, what is the firms after-tax weighted average close of capital at book value