How do I duplicate a calculation in a table higher than the table where the calcualtion currently exists?

How do I duplicate a calculation in a table higher than the table where the calcualtion currently exists?

To copy a single value from a lower table to a higher one:

1. Create an Average calculation in the higher table.
2. In the calcualtion wizard, select the field you want to copy from the lower table.
3. Add any conditions as necessary.