Function: minus(round(product(numbers('epe') if round(numbers('epe'), numbers("per")) > numbers("xxr") else numbers("per"), round(numbers('epe'), numbers("per"))), numbers('epe') if numbers("xxr") > round(numbers('epe'), numbers("per")) else numbers("per")), product(numbers("xxr") if numbers("per") > round(numbers('epe'), numbers("per")) else numbers('epe'), round(numbers('epe'), numbers("per"))))
