Sleep Apnea secondary to which of my service connected disability

Hi all , I have 30% for asthma and 10% for allergic rhinitis. My doctor strongly believe allergies worsen my SA , rightnow va denied my SA under asthma as secondary connection. Are my benefits going to be the same if my SA gets approved for 50% for secondary to my 30% asthma or secondary to my 10% allergic rhinitis? Calculator shows 70% but it doesn’t have any secondary connections . Is it bc secondary conditions are considered new and separate conditions?