~ Monthly
    Expenses:Phone            10.00 GBP
    Expenses:Rent            550.00 GBP
    Assets

2012-02-28 * Phone expense
    Expenses:Phone            20.00 GBP
    Assets:Cash              -20.00 GBP

2012-02-29 * Rent expense
    Expenses:Rent            530.00 GBP
    Assets:Cash             -530.00 GBP

$ hledger -f- check

#test budget --now 2012-02-29 --budget-format "%(justify(scrub(display_total), 0))\n"
#(-550.00 GBP, 560.00 GBP)
#(550.00 GBP, -560.00 GBP)
#(20.00 GBP, -10.00 GBP)
#(530.00 GBP, -550.00 GBP)
#(0, 0)
#end test
#
#