Top 10 and Bottom 5 Formula

Hi Guys

I had the two formulas below which were working which would find the top 10 and bottom 5 customers based on margin (column A on the “CSV” sheet).

Top 10 Formula:

=IFERROR(LARGE(IFERROR(SUBTOTAL(9,OFFSET(Margin,IF(MOD(ROW(Cust_Name)-ROW(INDEX(Cust_Name,1,1))+1,3)=1,ROW(Cust_Name)-ROW(INDEX(Cust_Name,1,1)),"a"),,3)),""),ROWS(U$18:U18)),"")

Bottom 5 Formula

=IFERROR(SMALL(IFERROR(SUBTOTAL(9,OFFSET(Margin,IF(MOD(ROW(Cust_Name)-ROW(INDEX(Cust_Name,1,1))+1,3)=1,ROW(Cust_Name)ROW(INDEX(Cust_Name,1,1)),"a"),,3)),""),ROWS(U$33:U33)),"")

However due to a change in the CSV file it is no longer working. Originally the plan was to have the CSV file to show data for one month however it is now going to be show data for all months.

What I am trying to achieve is the user selects the month in column Y16 on the report sheet and the formula returns either the top 10 or bottom 5 customers for that particular month from the data on the “CSV” tab (this is a change to what I originally required).

The formulas would go in the cells I have highlighted in red.

In the green highlighted cells I would like that to return a % based on the total sales from “Unique” Sheet data table but that’s not as important.

I have uploaded the file I am referring to.

Can anyone help please?

Paul