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Create a new Power BI Desktop file, and load the tables from the workbook in the above folder into your model.
Create measures so that you can display this table:
The last 3 columns omit (respectively) the air, land and water figures.
You'll need to create 3 measures, each one combining the CALCULATE and VALUES functions to omit one particular environment value.
Too easy? Combine the SUMX and FILTER functions to show the following table:
The last two columns come from measures summing the sales quantity (but instead of doing it over the entire purchases table, they just do it over those purchases which cost at least 10 pounds or less than 10 pounds, respectively).
Save your file as DAX fun, then close down the instance of Power BI Desktop that you're using.
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