Median in Data Model Pivot When Dollar Amounts Need to be Summed First

Just to provide some context, I am brand new to DAX, so I don't know what it can and cannot do.

Here is my current DAX for trying to sum based on the ID numbers before finding the median amounts.

=MEDIANX (
ALLSELECTED ( Table1[EMPLOYEE] ),
CALCULATE ( SUM ( Table1[AMOUNT] ) )
)

The problem with that data analysis expression is that when I use it, it aggregates all of my amounts.

What I want to do is show them according to pre-made data labels for income, which might be 60,000-69,999, and so forth Table1(INCOME_RANGE).

Is there a fancy DAX way to do that in a pivot table so that it will not just aggregate, but allow disaggregation by fields?

Okay, no replies yet, but I think I have it almost solved.

Here is the new working DAX:
=MEDIANX (
SUMMARIZE (
Range,
Range[INCOME_RANGE], Range[EMPLOYEE], "AMOUNT",
SUM ( Range[AMOUNT] )
),
[AMOUNT]
)

The problem is that I do not think the MEDIANX function averages the middle two values when there is an even number of values.
My data check using the regular Excel median formula confirmed that it is not acting as it should.

Is there a way around this? The standard MEDIAN formula cannot handle it because when I try, "too many arguments" is the error.
ARGH