I recently purchased a CC script, and after customising the site appearance I created a few imaginary members in order to test the system.
As part of this testing I made a few redemptions for ads, which display as Total Payouts on the site.
Does anyone know how I can reset the figure to zero in order to show a genuine figure?

Probably can easily be done thru mysql just delete the transaction or probably even delete them in Transaction Ledger

I deleted the transactions in the transaction ledger as you suggested, and as soon as the cron job updated the system my payout figure was reset to zero.
Thank you for the excellent advice.