Don't Panic! – There are three different versions of each song. You only need one. Most people will want download which is 256kbps AAC. If you have a really old or off brand MP3 player you many need the mp3 format. If you want the full CD quality then you want lossless (which is ALAC, use iTunes to deal with it.)
The contents are:
Please be our guests Saturday May 15th, 7pm at Kirkwood United Methodist Church for an evening of love songs with the Gateway Men's Chorus.