How to maintain different price in Info record within same period

Dear,
For Info price, we know that we can only maintain one price within the same valid period.
Now, our user has a request.
Due to different port, and Inco term is CFR.
They want to maintain different price for the same material and maintain price based on Port.
Is it possible?
How to maintain Port in Info record?
How to maintain different price within the same period.
Please let me know.
Thanks.