Total Amount and Tender Amount are different in RMS 2.0 SP3 POS

Hello, have an issue here. I am using RMS 2.0 SP3 POS

I have 3 items entered, 1 item per line with a quantity of 1 per line.

The total on the POS screen comes to $135.00

When I F12 to tender it shows up as $135.01

Why would this happen and how do I fix it ?

Thanks