Cost of debt.

Dunder-Mifflin, Inc. (DMI) is selling 600,000 bonds to raise money for the publication of new magazines in the coming year. The bond will pay a coupon rate of 11.6% with semiannual payments and will mature in 30 years. Its par value is $100. What is the cost of debt to DMI if the bonds raise the following amounts (ignoring issuing costs)?

a.$57,732,000

b.$53,124,000

c.$65,640,000

d.$74,526,000