Hi Lillyoona ,
Thank you very much for your post.
ATUM has an option to add a purchase price, not a wholesale price so not sure where this is coming from? Is this an additional plugin giving you the option to add wholesale prices? If so, you will not find any option to edit it from our Stock Central as we do not know and do not support the 3rd party developer.
I apologise for any inconvenience caused.