Hi,<BR>How can I create a column in a grid which calculates the change in a numeric or date value in a field from record to record? Consider a table which has a new record each day showing the amount of gas in the gas tank and the reading of the odometer. How could you make a grid that would show 1) the gas consumed each day and 2) the mpg achieved each day? The calculation is easy, but it involves creating a calculated field that refers to both the current record&#039;s value and the previous record&#039;s value. Does anyone have an idea how to do this?<BR><BR>I would really appreciate any ideas.<BR><BR>Thank you,<BR><BR>Charlie<BR>charlie@remotereporting.com <BR>www.remotereporting.com