Help - Need New Measure to Sum Up Records

[DNA]

I wanting help writing out a new measure to sum up information within the below table. Power Bi isn't quite calculating an average for me correctly, so I believe I need one more step in the process.  Below are the some example details. 

Table Name: FactMarkupApplied

Loan Number	Markup Type	Markup Dollars
12345	Branch	300
12345	Retail	100
45678	Branch	350
45678	Retail	450

I want a measure that sums up the total markup dollars for a given loan number. 

Loan 12345 total markup dollars is $400

Loan 45678 total markup dollars is $800

The reason I want a measure is so I can pull that measure into a visualiation and then take the average markup dollars by loan number.  In the above example, the average markup dollars by Loan Number is $600.   

[Zubair_Muhammad · Accepted solution]

@DNA

May be

Measure =
SUM ( Table1[Markup Dollars] ) / DISTINCTCOUNT ( Table1[Loan Number] )