Measure filtred dynamically based on slicer

Hello,
I am trying to dynamically filter on a measure based on different slicer selection, for example, when I select audio from category selection
The measure should be filtered on value>1000
And when I select a cell phone, value>5000

This is my trial: 

Sales FTD =
VAR Filtered_Audio = IF( [Sales Amount] > 1000, [Sales Amount], 0)
VAR Filtered_Cell = IF( [Sales Amount] > 5000, [Sales Amount], 0)
VAR _selected_category = SELECTEDVALUE('Product Category'[Category])
VAR Result = If(_selected_category = "Audio", Filtered_Audio,
If(_selected_category = "Cell phones", Filtered_Cell,
0
))
Return
Filtered_Cell

The problem with selected value always returns blank
Any help is appreciated