How to call different fields from different content in same view?
To get the values of "cage rent per day" from B to A's view, you must add a relation in content A view with the "Fee category" field.

Then normally you should select in the "cage rent per day" field settings in view A, the relation you've just added.

However, the idea is to have some reference to content B in view A to access B's fields values. And this is possible with relations .