When you remove inherit permissions from parent the typical choice is to copy the parent permissions for teh folder permissions. After this copy of the permissions you must maintain the folder permissions for each folder manually.
I would recommend switching the way you may be thinking about this around a bit because this is going to be more work. Instead of removing the inhereit permissions from parent from the folders you want to deny delete for… why not simply add the deny delete folder permission directly to these folders via a special permission?
To change permissions right click the folder (or file) and select properties. Then go to the security tab and click add to add the the user (or group) you will need to have permissions. In my examples I suggest to add the “deny” permission for delete, this is accomplished by going to the advanced button instead of teh add button. Type in the username, like before, and click ok. The resulting window will have a list of permissions available— Delete is one of them. Select the box in the deny column and you’re good to go after clicking ok.