DAX Studio-查询中指定的表达式不是有效的表表达式

我有一个 code 结果如下

EVALUATE
VAR AggregatedSalesInCurrency =
ADDCOLUMNS (
SUMMARIZE(
    'OPC SUMMARY (2)',
    'Calendar'[Date],
    'dimCurrency'[Currency Code]

),

        "@SalesAmountInCurrency", [Sales (Internal)],
        
        "@Rate", CALCULATE ( 
                 SELECTEDVALUE ( 'factFX'[FX Rate] )
        )
    )
RETURN
AggregatedSalesInCurrency

但是如果我添加SUMX函数 the expression specified in the query is not a valid table expression 为什么会这样?非常感谢。

   EVALUATE
VAR AggregatedSalesInCurrency =
ADDCOLUMNS (
SUMMARIZE(
    'OPC SUMMARY (2)',
    'Calendar'[Date],
    'dimCurrency'[Currency Code]

),

        "@SalesAmountInCurrency", [Sales (Internal)],
        
        "@Rate", CALCULATE ( 
                 SELECTEDVALUE ( 'factFX'[FX Rate] )
        )
    )
//RETURN
//AggregatedSalesInCurrency


VAR Result =
    SUMX (
        AggregatedSalesInCurrency,
        [@SalesAmountInCurrency] / [@Rate]
    )
RETURN
    Result