This is from the Coursera Power BI course. I'm trying to create a create a "Sales in USD" calculated table. I was instructed to select a New Table in Power BI and type the following:

Sales in USD =  
     ADDCOLUMNS(
        Sales,
        "Country Name", RELATED(Countries[Country]),
        "Exchange Rate", RELATED('Exchange Data'[Exchange Rate]),
        "Exchange Currency", RELATED('Exchange Data'[Exchange Currency]),
        "Gross Revenue USD", [Gross Revenue] * RELATED('Exchange Data'[Exchange Rate]),
        "Net Revenue USD", [Net Revenue] * RELATED('Exchange Data'[Exchange Rate]),
        "Total Tax USD", [Total Tax] * RELATED('Exchange Data'[Exchange Rate])
    )

It generated "The following syntax error occurred during parsing: Invalid token, Line 3, Offset 2,  ."

I've looked online for how the ADDCOLUMNS function is used, and the code above seemed to comport with the explanations that I read online.

What am I - I mean Coursera - doing wrong?