How to show an entry of a table in a KPI?

you can create 2 control. in this example, day1, day2. user needs to choose them and it shows the comparison of the sales for this 2 days
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You may apply the same concept to compare the sales for a day range.
I have 2 parameters in my example


And added 2 calculated fields
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And includes these 2 fields in the KPI