McWherter Instruments sold $500 million of 8% bonds, dated January 1, on January 1, 2013. The bonds mature on December 31, 2032 (20 years). For bonds of similar risk and maturity, the market yield was 10%. Interest is paid semiannually on June 30 and December 31. Blanton Technologies, Inc., purchased $500,000 of the bonds as a long-term investment.