on January 1, 2018, $500,000 of 20-year, 5% bonds were issued. The bonds pay interest semiannually on June 30 and December 31 each year. If the market rate of interest at the time of the bond issue was 4%, the selling price of the bonds is 57, $570,139. b. $396,329. c. $568,394. d. $910,332. none of the above