small php code needed

ok i have a database of 500 or so people and a column that displays X amount used i need the code when activated by cron to tally up all the amount used. Compare that to the day before( this info will be in a different table) and subtract from yesterdays amount so your left over with the difference, then submit the day, overall total, and difference data to that table

hi

i have 4+ years experience in php, i will help you in this. contact me [email protected]