Modx+Shopkeeper "out of stock" function. How to do?

Question

MODX

Good afternoon. There is a bunch of CMS Modx Evo 1.0.6. Installed Shopkeeper 1.3.4.
If the balance of the goods = 0, how can I replace the "Buy" button with the inscription "Out of stock"?
Thank you for attention.

Answer 1

docs.evolution-cms.com/Extras/Snippets/if
www.yotadom.com/evo-snippet-if-usloviya.html
Make condition... if remainder = 0 then .... otherwise ....