Calculating sales orders, while ignoring certain id's

Something like this:

[Your measure] =
sumx(
    distinct( T[Order] ),
    calculate(        
        switch( true(),
            // if all visible items are User -> SUM the price
            and(
                distinctcount( T[Item] ) = 1,
                "user" in distinct( T[Item] ) ),
                    sum( T[Price] ),
            // if one of the items is Unlimited -> get the value for Unlimited    
            // what happens if there are 2 Unlimited's in the same order?
            "unlimited" in distinct(T[Item] ),
                calculate(
                    selectedvalue( T[Price] ),
                    T[Item] = "unlimited"
                ),
            // if order contains anything else -> SUM the price for User
            calculate(
                sum( T[price] ),
                keepfilters( T[Item] = "user" )
            )
        )
    )
)