I need to know how to make my form repsonses display how much larger a quantity something is this time than last time for each form completer. For example, I will be asking members to report their total quantity each month and I want to be able to determine how many more they had this month than last. The only number members will be able to report is the total number. How do I set up my form to do the math and subtract the last month's report from this month's and provide me with that answer for every person that completes form?
Although I can come up with a solution that will give you the difference between the last two months, I do not believe that we can give you a general, month-over-month, solution. If the "last two months" solution is sufficient, let me know -- it involves some complicated/tricky formulas, and will be easier to explain if I can set them up specifically for your table.