visual studio 2005

we are using visual studio 2005 and MS access
and Oledb connection i.e we are using manual connection for the connection with database
Actually we want to update our general ledger table and cash table in access from a single form cash receipts.
In general ledger we want updation in a way that the (decimal) entry in the table is updated by adding the entry we are giving now i.e
sum of the previous and new entry
Plz help us out.

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