Optimizing DAX using IF vs DIVIDE section error

[lt79_Pax]

Dear Power BI Representative,
I am reviewing the Choosing between IF and DIVIDE section of the 'Definitive Guide to DAX' Chapter 20.
When I try to run the DAX expression I receive an error message regarding the Sales table.
I do not understand why this query is not functioning. Please advise.

Thank you.

DEFINE
MEASURE Sales[Average Price (slow)] =
VAR Quantity = SUM ( Sales[Quantity] )
VAR SalesAmount = [Sales Amount]
VAR Result =
IF (
Quantity <> 0,
SalesAmount / Quantity
)
RETURN result
EVALUATE
TOPN (
502,
SUMMARIZECOLUMNS (
ROLLUPADDISSUBTOTAL(
ROLLUPGROUP(
Customer[CustomerKey],
'Product[Brand]
), "IsGrandTotalRowTotal"
),
"Average_Price_slow_",'Sales'[Average Price (slow)]
),
[IsGrandTotalRowTotal], 0,
'Customer'[CustomerKey], 1,
'Product'[Brand], 1
)
ORDER BY
[IsGrandTotalRowTotal] DESC,
'Customer'[CustomerKey],
'Product'[Brand]

[v-angzheng-msft · Accepted solution]

 Hi, @lt79_Pax 

A single quotation mark(‘)should be added after the product table name.

ROLLUPGROUP ( Customer[CustomerKey], 'Product'[Brand] )

Is this the result you want? Hope this is useful to you

Please feel free to let me know If you have further questions

Best Regards,
Community Support Team _ Zeon Zheng
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