company's annual report by accessing the company's home page and its Investor Relations section. Alternatively, you can go to other external sources, such as bondsoolinecom, for corporate bond spreads, which can be used to find estimates of the cost of debts Remember that you need the after-tax cost of debt to calculate a rm's WACC, so you will need MMM's tax rate {which has averaged about sort. in recent veers}. What is your estimate of some after-tax cost of debt