How do I let my mom let me play Clarinet?

well you could rent a clairenet per month it's like 10 dollars and u can switch insturments in band if u talk to the band instructer and just tell ur mom what u said to us here and she'll probably say if you want to so ba dthen i guess u can! but why did u start trumpet in the first place anyway but if you wnat to buy a clarinet they cost like 300 fdollars so it costs alot so my edvice to u is to rent one per month!