2. Import a blank csv file - This option allows you to clear a vendor without completely purging them from the database. Create a blank csv file, save, and then upload it using the respective vendor import. This will mark current pricing as 'past', and then uploading no information to replace it.
Note: If there are any prices with an effective date in the future, you will have to change the effective date to extend beyond that date in order to capture/remove those records.
3. Completely remove all pricing data from FOS - If you want to simply remove all pricing from FOS for all vendors, you can have your hosting support team rename the APFUEL.BTR as APFUEL.old, then recreate the APFUEL.BTR using the 'Create Files' utility from the login window.