How to aplly filter on a cross tab table ?

Hi

I have a cross tab table

Attached is an example from efashion

This includes Month ,City and sales revenu inside the table

I added a sum column at the end of evry row

Now, I want to add filter that will show only months that the the sum of sales revenue is above 4,000,000

The answer of that is only the rows of months 1,3,4,5,9,10,12

I did not Manage to do it. Need help

Thabk you