How I can compare value number in 2 table Appsheet

Item's Price

ABC
1.0002.0005.000

DATA

DateNameItemPrice
1-MayJohnA1.000
2-MayMikeA1.500

I want compare Column Price (DATA) vs Item's Price with Format Rule in Appsheet.

I search some function but I cant find the solution.

Thanks for help! 

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