Doing great. Thanks!!
Approval flow for each CAS# that you have multiple suppliers/catalogs for. So essentially the lookup file has that CAS# listed and irrespective of which catalog the item is from the approver is added and then the approver (can be a group) can lookup manually if it is the least price. I know this is not the most desired way but a work around that makes sense in certain scenarios.
Cheers!!
Vilas