Inventory Placeholders:
%balance% - Bank Balance
%deposit-whole% - Bank balance after a deposit whole action
%deposit-half% - Bank balance after a deposit half action
%deposit-fourth% - Bank balance after a deposit fourth action
%withdraw-whole% - Bank balance after a withdraw whole action
%withdraw-half% - Bank balance after a withdraw half action
%withdraw-fourth% - Bank balance after a withdraw fourth action
%eco-balance% - Economy Balance
%upgrade-<cost,limit,interest,material,name>% - Current Upgrade placeholders
%next-<cost,limit,interest,name>% - Next Upgrade placeholders
all placeholders in PlaceholderAPI are added (if installed)!

Custom Model Data:
To add to the custom model data use these examples:

Without Extra Id's
With Extra Id's
Conclusion

To add custom model data just add a ; to the end and then the <data> you desire.