Dynamic Line Chart with Selection and Its Higher L1 & L2 Categories'

Hi All, 

Thanks to anyone who takes a look.

I've been frustrated for a few days, trying many ways and checking numerous posts, parameter (not working).

The one below is close, but I'm still having trouble implementing the needs. 

Very close post 

Model Detail:

I'm working with a 3-tiered data model and have a measure called [_Line Chart] for a dynamic line chart.

[_Line Chart]

• to use Table - Master2 as a control to ensure that all Tier 1 & Tier 2 numbers can be counted starting from Tier3's start date.
• Table - Master is the original import data

Tiers : Here's how the tiers should display:

• Tier 1: Always shown with its calculated number.
• Tier 2: Appears as a single line when selected.
• Tier 3: Also appears as a single line when selected.

Request:

There will be 2 slicers for Tier 2 and Tier 3.

• Users can select Tier 2 from Slicer 1, then select the item they would like to see the trend for under Tier 3.
•  
• The line chart should show 4 lines:

2 from Tier 1 (assumed as United States-level numbers),

1 from Tier 2 (assumed as States-level numbers),

1 from Tier 3 (assumed as City-level numbers).

 Mock Test PBI Model 

Thanks in advance!!

Current view, selected with Ctrl.Expected Slicer