Hi I am new and I have been trying to work out my problem for so long I am pulling my hair out.
I am trying to calculate the sum of the last 3 months when new data is added every month without having to change the formula.
Like this;
For the last 3 months
Aug-13 5
Sep-13 4
Oct-13 4
Nov-13
Dec-13
Jan-14
Feb-14
Mar-14
Then when I add data it calculates the sum for the last 3 months - now leaving august out and moving down to november
Aug-13 5
Sep-13 4
Oct-13 4
Nov-13 4
Dec-13
Jan-14
Feb-14
Mar-14
I need it to be laid out how I have laid it out in my excel spreadsheet.
I have tried the offset function and it does not work and other formulas only calculate sum of one month.
I have also tried to manually input formula but it doesn't work either.
I have attached the data and I cant change the layout because this needs to be spread company wide. I need the figure for jobs to appear in K6 and the figure for CVsent to appear in L6 an so on.
Imagine I am adding new figures every month.
I know the formula is something like =sum(3months)-previous month but this has to be running.
I have attached the data. Please help. I hope I am making sense.
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