Hi all the gurus hanging out here. I would like to seek your expertise regarding PHP.

Example:

Im currently using flat rates with 5 clone flat rates.

I have a flat rate call "fiveflat".

For this flat rate, every purchase below $100 will be charge $20.
For every purchase above $100 will be charge $15 instead.

How should I change the coding for this cloned flat rates?

I would like to say thank you and appreciate any advice given =)