I need a field that is a sum of sales for that day on a layout. Right now I have a summary field giving me a running total but I need to have the same value across all records for that day. Any suggestions?

If your found set dispalys only records for that day, then you can just use a summary field (running total not needed). If your found set displays all records in your databse including those not from the current date, then you can try this.

Create an unstored calc with Get (CurrentDate). Create a new table occurrence and relationship keyed from the new calc to the SalesDate field. Now you should be able to use a summary field from this NEW table occurrence on your layout and it should give you the total for today. If you do not want to use s summary field, then you can always use Sum ( YourNewTO::Amt )