Still not getting it

Question

I know this has been covered many times but I'm not getting it, perhaps if someone has posted a video that may help.
Creating a simple budget sheet.
Made 12 sheets for each month. Need to have a 13 sheet that adds up the total from the other sheets.
I have simply made a few tables in say Jan sheet, then duplictaed this sheet to show the 12 months (not sure if thats the best way to do it)
For example in one table it has stuff relating to car so:
car payments
car service
car fuel
car imsurance
then for that table I have a total for "car" stuff
so in the 13 sheet I would like to show the same table with the year totals:
car payments for year
car service for year
car fuel for year
car imsurance for year
car stuff year total
So really the 13 sheet is a duplicate for one of the months and each cell in all the tables are totals from the 12 months.
I have around 40 cells in each sheet that need to be added up.
Hope that makes sense

Answer 1

Hmmm...
Looks like the discussions software is having trouble syncing posts and the dispatched email. The email version of your post arrived about 140 minutes ago, and I was able to open your screen shot using the link in the email. (EDIT: Looks like the actual post appeared a while after that, although it's marked with the same time as the email.)
From the screen shot, I gather:
Your 12 sheets are named Jan, Feb, Mar,…Nov, Dec
Each sheet contains seven tables, named:
Regular expenses, Store Expenses, Other Expenses, Income for Xxxxxxx yy, Balance previous month, Total expenses Xxx, and Balance for Xxx
For all of these tables, the table name is displayed above the table (not in row 1 of the table), there are no merged cells, and the data begins in row 1 of the table.
Totals for the first three tables are in cell B22 of that table.
Total for the fourth table (Income) is in cell B8 of that table.
The three samll tables are all single cell (A1) tables, with the name of the table displayed above it.
With those assumptions in mind, I would suggest a single table for your Summary sheet, following the model below.
The table has one header column, two header rows, and one footer row.
Formulas:
B3: =Income for January 2014 :: B$8
This is a straightforward cell reference to the cell B8 on the named table. As these tables names each include the full month name, there will be no duplicates, and Numbers will drop the sheet names if they are included. Fill down to row 14, then edit January to match the full month name of each row.
C3: =INDIRECT($A&"::"&C$2&" Expenses::B22")
INDIRECT builds the cell address from the contents of the referenced cells and the text included in the indirect arguments. This formula may be filled right to column E and down to row 14.
F3: =SUM(C3:E3)
Fill down to row 14.
G3: =B-F
Income minus expenses gives the net change in the balance for this month.
Fill down to row 14.
H3: =H2+G3
Previous balance plus net change gives the current balance.Note that H2 contains the balance for December 2013.
B15: =SUM(B)
Fill right to column G.
Because Row 15 is a Footer row the formula can regerence all of column B without generating a self reference error.
Regards,
Barry