Vending Machine

Question

Hello! Can someone tell me how could be the best way of writing this code? Thank you!
https://code.sololearn.com/cz402tpZxALR/?ref=app

Answer 1

https://code.sololearn.com/cHmchxl7RKTR/?ref=app

Answer 2

https://code.sololearn.com/cSWmMTgca0hB/?ref=app