Summation of transactions in query (but not state of account)

[Christopher Allan Webber]

Hi all,

I have a puzzling question for you.

Say I have an account that has a bunch of money going in, and a bunch of
money going out.  I just want to find out how much money went *into* an
account over a period of time.

I'd like something along the lines of `ledger reg` output, except where
the running balance on the right is something like:

Say I have something like this:

#+begin_src ledger
2012/05/01 Money goes in
  Assets:Something unrelated  $9000.00
  Income:Herp derp

2012/05/02 Money goes in
  Assets:FOO pool     $1025.6
  Income:Herp derp

2012/05/12 Money comes out
  Expenses:Costs     $600.00
  Assets:FOO pool

2012/06/11 Mo money mo problems
  Assets:FOO pool     $2000.00
  Income:Herp derp

2012/06/11 Mo money comes out
  Expenses:Costs     $1500.00
  Assets:FOO pool

2012/06/21 Paid again
  Assets:FOO pool     $300.00
  Income:Herp derp
#+end_src ledger

If I run this command:

$ ledger -f herpderp.ldgr reg "foo pool"
12-May-02 Money goes in             Assets:FOO pool            $1025.60        
$1025.60
12-May-12 Money comes out           Assets:FOO pool            $-600.00         
$425.60
12-Jun-11 Mo money mo problems      Assets:FOO pool            $2000.00        
$2425.60
12-Jun-11 Mo money comes out        Assets:FOO pool           $-1500.00         
$925.60
12-Jun-21 Paid again                Assets:FOO pool             $300.00        
$1225.60

Of course, I get the transaction of things.  But I want to see *just*
the income.  So I can do this:

$ ledger -f herpderp.ldgr -d "b>0" reg "foo pool"
12-May-02 Money goes in             Assets:FOO pool            $1025.60        
$1025.60
12-Jun-11 Mo money mo problems      Assets:FOO pool            $2000.00        
$2425.60
12-Jun-21 Paid again                Assets:FOO pool             $300.00        
$1225.60

But what I really want is to have the right hand column not say the
state of the account in reality, but the state of the account from
within these transactions listed.  So what I'd like to see is:

$ ledger -f herpderp.ldgr -d "b>0" reg "foo pool" --sumthing
12-May-02 Money goes in             Assets:FOO pool            $1025.60        
$1025.60
12-Jun-11 Mo money mo problems      Assets:FOO pool            $2000.00        
$2025.00
12-Jun-21 Paid again                Assets:FOO pool             $300.00        
$2325.60

I'm not sure what something would be --sumthing, but it would be good to
have it. :)

Is there an existing trick to pull this off?

 - Chris