Different calculation for each row based on a different column

Hello experts

I am new to Power BI and have a question how to implement the following scenario:

I have a dashboard in which the turnover category is displayed in the first column and a column in which the turnover for the category is displayed. Both come from different tables. However, the calculation is not the same for each category. How can I make a calculation based on the category shown in column 1? Simplified example:

It is not clear to me how I can build a different calculation for each row in column "Turnover" based on column "Category".

I have tried to work with a SWITCH statement. But that doesn't work somehow, but it still uses the same formula for each line.

Thank you for your help