If you find that you are having problems where the 'product pack price' is reverting to zero values when switching between tabs in the 'Product screen' then please upgrade to EPOS v3.11 or later to resolve this issue.
Instructions to upgrade to the latest version of SellerDeck EPOS can be found here:
http://community.sellerdeck.com/showthread.php?p=322782
Instructions to upgrade to the latest version of SellerDeck EPOS can be found here:
http://community.sellerdeck.com/showthread.php?p=322782