In December 2014, the company failed to recognize $4,000 in consulting revenue earned during 2014. This revenue was recognized when the cash was received in January 2015. Make the necessary correcting entry, assuming that (1) the error was found in May 2015 after the 2014 books had been closed and (2) the error was found in May 2016 after the 2015 books had been closed. Ignore income taxes.