I'd use a related table of records in a portal instead of two repeating fields. It makes it much easier to get the needed total and subtotal values.
These are all within one record. I'm new at this so I'm trying to relate to the terms.
Yes and the fact that it is "all within one record" is the problem. If you add a related table and use a portal in place of your two repeating fields, getting the desired sub totals becomes easier to set up.
You may want to look up "portal" in FileMaker help and in any training materials on FileMaker that you have available.
I think I see where you're going. Thanks for pointing me in the right direction. I expect a long learning curve but I want to make sure I'm on the right curve. Much appreciated.