Categorize materials by sales

Hi all,

I'm still learnig the ropes with Power BI and trying to solve this scenario and I'm stuck. The model below contains two fiscal years of data. What I need to do is identify the total sales for materials that have orders in a categorization as follows:

1. If a material has sales only in the prior year - PY

2. If a material has sales only in the current year - CY

3. If a material has sales in both years - Both

4. Neither years - None

I've looked at various ways to do this and I'm stuck. The problem I'm running into is that users want to filter the entire report by PY, CY etc. So, I need to be able to add the 'Material Categorization' to a slicer and/or the legend of a bar chart and I cannot do that with a measure.

Any suggestions would be truly appreciated!