New customer measure getting filtered by product slicer = do not want. :( Just want # of brand new.

[slashfemme]

Hello!

I've created the following measure for new customers:

New Cust Sales =
VAR Customer = ALL(sales[Customer Number])
RETURN
CALCULATE([Total Sales], FILTER(Customer, CALCULATE(COUNTROWS(Sales), FILTER(ALL(Dates), Dates[Date] < MIN(Sales[Date])))=0))

I have two slicers on my page: one for Fiscal Year and one with a list of Product Types ("GFS"). The new customer sales work the way I want when sliced by date, but when I make a selection on product type I am getting a return of customers who are new TO THAT PRODUCT. They could have purchased many times before, just never that product. What I really want is the number of customers who are brand new to the company who are purchasing that particular product. Is there a way to code this into my existing measure?

In the picture below, the total ($61K) is from legitimately new customers. I would love for each GFS product category to actually list the $ in brand new customer sales.

Thank you!