Multiple Running Totals to Compare Different Years

I ended up solving it myself. I lost the count of how many variations of the DAX I tried until I came up with the following solution. 

For starters I modified my calendar table to create groups of years. I added column Rolling12Months that defines each year

Next I updated my [Sales $ LY] and [Sales $ LLY] to use Rolling12Month instead of MonthOrdinal, 
Finally for Rolling Total Measures all of them are the same except which Sales Total they call

-- Sales Totals
MEASURE [Sales $] = CALCULATE ( SUM ( SalesData[SaleLineTotal] ) )

MEASURE [Sales $ LY] = 
VAR RY = [MinRollingYear] + 1
VAR Results =
    CALCULATE (
        [Sales $],
        REMOVEFILTERS ( 'Dim - Date' ),
        'Dim - Date'[Rolling12Month] = RY,
        VALUES ('Dim - Date'[MonthName])
    )
RETURN
    Results

MEASURE [Sales $ LLY] = 
VAR RY = [MinRollingYear] + 2
VAR Results =
    CALCULATE (
        [Sales $],
        REMOVEFILTERS ( 'Dim - Date' ),
        'Dim - Date'[Rolling12Month] = RY,
        VALUES ('Dim - Date'[MonthName])
    )
RETURN
    Results

-- Rolling Totals
MEASURE [Sales $ RT] = 
var MaxMonth = MAX('Dim - Date'[MonthOrdinal])
var Result = 
    CALCULATE(
            [Sales $],
            'Dim - Date'[MonthOrdinal] <= MaxMonth,
            REMOVEFILTERS('Dim - Date'),
            VALUES('Dim - Date'[Rolling12Month])
    )
RETURN Result

MEASURE [Sales $ RT LY] = 
var MaxMonth = MAX('Dim - Date'[MonthOrdinal])
var Result = 
    CALCULATE(
            [Sales $ LY],
            'Dim - Date'[MonthOrdinal] <= MaxMonth,
            REMOVEFILTERS('Dim - Date'),
            VALUES('Dim - Date'[Rolling12Month])
    )
RETURN Result

MEASURE [Sales $ RT LLY] = 
var MaxMonth = MAX('Dim - Date'[MonthOrdinal])
var Result = 
    CALCULATE(
            [Sales $ LLY],
            'Dim - Date'[MonthOrdinal] <= MaxMonth,
            REMOVEFILTERS('Dim - Date'),
            VALUES('Dim - Date'[Rolling12Month])
    )
RETURN Result

Fo the final result I finally got by graph that I was looking for.