Trying to consolidate 3 measures into 1?

[biglostenergy]

Hi I was able to create these 3 measures:

Total = (CALCULATE('Sales'[x], 'Customers'[Markets]="All of US"))


CustomSales = (CALCULATE(SWITCH(
SELECTEDVALUE('Customers'[Total US Markets]),
"Retailer 4",
CALCULATE([x],'ITEM Control'[Control Item] = "N"),
CALCULATE([x]))))


Division Equation =
SUMX (
VALUES ( 'Customers'[Markets]),
DIVIDE (
CustomSales,
CALCULATE ( Total, All('Customers'[Markets] )
) * 100
))



But I want to improve my DAX and just create one measure to have everything involved.

What the 'Total' Measure is doing is creating my dominator.

I have a bunch of Customers and one of them has this special use case where I need to use a switch statement to get the information for that retailer, this is essentially my numerator (there's 30 different retailers, the switch is only needed for retailer 4)

CustomSales = (CALCULATE(SWITCH(
SELECTEDVALUE('Customers'[Total US Markets]),
"Retailer 4",
CALCULATE([x],'ITEM Control'[Control Item] = "N"),
CALCULATE([$]))))


Now I have this measure doing this Retailer/Total * 100, for each specific retailer

Division Equation =
SUMX (
VALUES ( 'Customers'[Markets]),
DIVIDE (
CustomSales,
CALCULATE ( Total, All('Customers'[Markets] )
) * 100
))

Hoping to get all 3 into just one DAX measure I can copy and paste and send to friends.