2 Replies Latest reply on Oct 30, 2015 5:01 AM by jondresser

    Enter a new number in a field then subtract the previous field from that number?


      I'm new at Filemaker. I'm trying to enter a new "Water Meter Reading" into a record field. Then I want to subtract last month's reading from this new number. I'd like to place the resulting number into a Water Used field. Is it possible?