Slicers sorted by column

I have a dropdown slider, and I can't seem to get it to display the information I'm looking for. Would very much appreciate anyone's input.

I would like it to display the total idle downtime for each month.

I would like the dropdown slider to display each of the above fields. However, when I try to put them into the slicer, I get the result below.

 
I'm very new to Power BI, so please excuse me if it's an easy fix. I just can't find a solution anywhere. Thanks.