[Orgmode] Advanced table

[andrea Crotti]

   I was trying to write down everything I spend and where I do, so I set up 
this simple table.
   So basically every day I have some expenses and on top I have the total.
   
   If the pattern is always the same (vsum(@address@hidden)) I would like to 
have that formula every time I add a 
new thing.
   
   Now supposing that I always write the same day I pay best thing would be to 
have an automatic system 
that asks me the various fields and insert them in the table, does it make 
sense?
   
   
   | DATA             | WHAT       | WHERE       | HOW MUCH |
   |------------------+------------+-------------+----------|
   | [2009-09-25 Fri] |            |             |    28.95 |
   |------------------+------------+-------------+----------|
   |                  | food       | supermarket |     7.85 |
   |                  | ticket bus |             |      2.3 |
   |                  | tea + ice  | ice uno     |      4.4 |
   |                  | ticket     |             |     14.4 |
   |------------------+------------+-------------+----------|
   | [2009-09-26 Sat] |            |             |       41 |
   ...

   This was an example of the data. I'm not quite sure that this data structure 
would be later easy to 
manipulate, what do you think?
   Better solutions??