When you copied the sheet it kept the reference to the other sheet in the formulas like this;
=SUM([Budget.xls]Annual!C10:C25)
The [Budget.xls]Annual! refers to another file and sheet. You will need to remove these references to leave only the formula =SUM(C10:C25)
You can use Find and Replace to remove them.
Note: Backup your work. Use at your own risk. Not responsible for lost data.
- On the Edit menu, click Replace.
- In the
Find what box, type refrence to the other sheet, [Budget.xls]Annual!, and leave the Look in box empty.
- In
Options choose to Look in formulas.
- Click Replace All.