Averaging measure average results (Averaging subtotals in a matrix)

[mpicca13]

I have created measures which calculates rates and returns an average based on 3 context: location, job title and department

What I need now is to also return an average of those results within the same department and location (2 context)

As you can see in the image below the "Construction" Department has 3 job titles for the "IE" Location.

Left hadn side table details the resulting averages.

On the bottom right hand side you can also the employee breakdown by location.

I need the the average of those subtotals to then populate in the main table on the left hand side as a roll-up subtotal.

The end results should be 22.50 as the average of all 3 job titles in the "Construction" Department within the "IE" location.

Been struggling with Dax calculations to figure this out. Some guidance would help me immensly

the DAX I used to calculate the average you see in the left hand table is :

Average Hourly Rate per Employee by Category =

    AVERAGEX('Active Employees',

        IF('Active Employees'[Department] <> "", [Max Hourly Rate], 0))

Max Hourly Rate =

    CALCULATE(

        MAXX('Active Employees',

            'Active Employees'[Hourly Rate]))