Billy's Hamburgers issued 5%,10-year bonds payable at 80 on December 31,2016 . At December 31,2018 , Billy reported the bonds payable as follows: (Click the icon to view the bonds payable.) Billy's pays semiannual interest each June 30 and December 31. (Assume bonds payable are amortized using the straight-line amortization method.) Read the requirements. Requirement 1. Answer the following questions about Billy's bonds payable: a. What is the maturity value of the bonds? $