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Calculating Nett values betwen records

Question asked by HermanKloppers on Sep 30, 2010
Latest reply on Oct 3, 2010 by HermanKloppers

Title

Calculating Nett values betwen records

Post

 
Each record consists of a month text field, (10 * labels) for the house nr's and 10* text fields for the electricty usuage to be inserted. Against each apartment/house number the accumulative electricity reading for the specific month is entered -  the following month, the new accumulative readings (identical apartments) is entered via a new record – I require the program to deduct the previous reading from the Current reading to determine the Nett usage for the particular month

Is this possible ?

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