We also need to set safeguards for orders. Rye currently does not support partial fulfillment, so these settings are meant to ensure orders can only be completely fulfilled.
From the Purchasing System page, click the Edit link under Order Safeguards section
You will be brought to this page
Choose the values selected in the screenshot under Action to take
Item Price → Cancel the entire order
Delivery time → Cancel the entire order
You can set the number of days to whatever you like
Seller substitutions → Use Fulfilled by Amazon only
This is optional but if not chosen you run the risk of shipping used items or delivery time being longer than expected
Low Stock → Cancel entire order
Item unavailable → Cancel entire order
After you select the values, click the Save button
Click the Back to purchasing system settings link at the top