Gladys: The Levy site has your tune in the key of Ab. To transpose the tune into your requested key of A, play the notes as written on the ledger lines but imagine the key signature as being 3 sharps instead of 4 flats. Your pitch will be a half tone higher than is written on the sheet music.

Somewhere buried in the bowels of Mudcat is a discussion (I can't find it) on the "Rule of Seven" which allows a semi-tone key change without rewriting the music by hand.
Perhaps someone with better search skills than I can make a link.