Field help (FIFODATE) @ L.V. Expertise X3

Enter an end date to include journal entries up to and including that date. This date is recorded as the accounting date when you post the rate calculation.

Note: The date must be the last day of an existing, open period. The date range can span multiple periods.

If you change the end date after performing an Accounting cancellation on the most recently posted record, an alert message displays: "All records previously computed will be removed from the details table. Do you want to proceed?"

No: The date does not change.
Yes: The date changes and all the lines from the screen except initial currency stock are removed from the screen.

Then you can:

Click Cancel to remove entries.
Click Save.
Click Data extract to calculate the FIFO rate.