Function: sum(max(minus(numbers('yyx'), numbers("per")), numbers('yyx')), minus(numbers('yyx'), numbers("per"))) if minus(numbers('yyx'), numbers("per")) > max(minus(numbers('yyx'), numbers("per")), numbers('yyx')) else sqrt(sum(max(minus(numbers('yyx'), numbers("per")), numbers('yyx')), minus(numbers('yyx'), numbers("per"))))