How to add additional tables within workbook that will also show summary on main sheet

I'm trying to describe this as best as I could:

This is the template that I'm intending to use

http://office.microsoft.com/en-us/te...102264314.aspx

I would like to have 20 Expense item for each month, but also show up on the Year Trends main sheet, I can copy the additional Expense table item for each month, but how do I make it show up on the main Year Trends?


Thanks