How to display the parent and its child in a spinner list?


here is the data in my firebase. i want to display the data in an organized way for our mobile app. when i select the ‘one peso…’ its data will be displayed same goes to five-peso and ten-peso (which is not in the pic). can somebody help me? it’s due tomorrow and i need to submit it as soon as possible. i don’t know if my blocks are correct. can somebody teach me? please.

What is called here global number Aluno?? No connecting with your fb on comparing with your screenshot