On March 31, 2011, Gardner Corporation received authorization to issue $50,000 of 9 percent, 30-year bonds payable. The bonds pay interest on March 31 and September 30. The entire issue was dated March 31, 2011, but the bonds were not issued until April 30, 2011. They were issued at face value. Explain why the issuing corporation charged its bond investors for interest accrued in April 2011, prior to the issuance date (see part b above)