questions. (urgent)

Hi,
        I would hope someone can point me into the right direction doing this. 
It
has been 5 hours and I still haven't figured out how to do this.
My xml is similar to this:
<persons>
        <group>A</group>
        <person>
                <name>Bob</name>
                <amount>10.00</amount>
                <date>05/13/2003</date>
                <paymentType>CASH</paymentType>
        </person>
        <person>
                <name>Ada</name>
                <amount>20.00</amount>
                <date>05/10/2003</date>
                <paymentType>DEBIT CARD</paymentType>
        </person>
        <person>
                <name>David</name>
                <amount>15.00</amount>
                <date>05/13/2003</date>
                <paymentType>CASH</paymentType>
        </person>
        <person>
                <name>Kenny</name>
                <amount>20.00</amount>
                <date>05/13/2003</date>
                <paymentType>CHEQUE</paymentType>
        </person>
</persons>
<persons>
        <group>B</group>
        ...
</persons>

I want an xsl which can produce something as follow:

05/10/2003
        DEBIT CARD
                        Ada                     20.00
        TOTAL FOR DEBIT CARD            20.00(*)
TOTAL FOR 05/10/2003                    20.00(*)

05/13/2003
        CASH
                        Bob                     10.00
                        David                   15.00
        TOTAL FOR CASH                  25.00(*)

        CHEQUE
                        Kenny                   20.00
        TOTAL FOR CHEQUE                        20.00(*)
TOTAL FOR 05/13/2003                    45.00(*)

TOTAL FOR GROUP A                               65.00(*)
....

TOTAL FOR ALL GROUP                     sum of all group(*)


I have already got the grouping working correctly with a solution derived
from:
        http://www.dpawson.co.uk/xsl/sect2/N4486.html#d4085e391

However, I can't get the TOTAL working.
Can someone please share some light on how I can get the total (the one with
(*)) using XSLT?

Any help would be appreciated. Thank you.


Kelvin

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