Installation document for Request Quote when Product Zero Price
Go to Extensions ➔ Modules ➔ Click install Request Quote Product Zero Price as image 3.
Change Status into Enable and edit another settings as image 4.1.
There are 3 optional types or all products selection for you.
You can combine one or both three types and exclude more popular products you need to show the price.
Unzip downloaded package and choose exact folder for your Opencart version.
Then you will see the file Request Quote Product Zero Price OC v*.* - v*.*.ocmod.zip or only ***.ocmod.xml.
Go to your Opencart admin panel ➔ Extensions ➔ Extension installer.
Upload file ***.ocmod.zip or ***.ocmod.xml ➔ Continue as image 1.1.
Go to Modifications ➔ Click clear ➔ refresh buttons as image 1.2. This will remove and regenerate new cache for extension.
2. Add permission
Login to your Opencart admin and go to System ➔ Users ➔ User Group.
Click edit your user group name (Opencart default user group name is Administrator as Image 2.1).
Check both Access permission, Modify permission for Request Quote Product Zero Price as image 2.2.