bash script to convert, compress

[tsitras]

Hi. i am running debian 6.0.6 and i am banging my head to create a simple 
script that will run periodically (through cron).
 i do have a whole lot of wav files in opt/wavfiles and i do need:
 -convert them to mp3
 -delete the wav files that have been converted to mp3
 -compress the files and move the compressed file to /opt/mp3backups
 is there a simple script ready for the job?