You might try an Initial Clear. To do this:
1) Unplug the register from power.
2) Turn the keyswitch to the P position.
3) While holding down the button in the lower right corner, usually the CASH key, plug the register in.
If you do it correctly, the register will print a slip that says "INITIAL CLEAR !!" on the receipt printer. This won't affect any of the programming or totals in the register.
Steve, October 2009