Question about summing rows up

Hi, If I have a table like this:

Date Deposit/Withdraw
---------------------------------
01/01 +5,000.00
01/12 -500.00
02/14 +1200.00
03/15 -300.00

Then how to build a report based on the table above with a column which displays the balance automatically?

Date Deposit/Withdraw Balance
--------------------------------------------------
01/01 +5,000.00 +5,000.00
01/12 -500.00 +4,500.00
02/14 +1200.00 +5,700.00
03/15 -300.00 -5,400.00

Thanks!

Matheus