SD Variant Configuration - characteristic value computation

Hi Everyone

Greetings from Vinod

i am creating a variant material which has 3 characteristics. out of the 3 characteristics, 2 are inputed by the user and the third characteristic needs to be populated with the difference of the 2 chatacteristic values that we have entered before. is there a standard setting that we have to maintain, or should we do a custom development on the same. the third characteristic value which is computed based on the difference of the precious two characteristic will then derive pricing of the variant material. please throw some suggestions and inputs in this discussion.