@ElonMuskAOC 39 or 34
I have tried to separate the two sides ear phone, both can work, so for worthy, two sides Worth $10 one side is $5, so the answer should be 39.
As 5+(10+5+2)×2=39.
If the price of people not the same as ear phone, the answer should be 34.
As 0+(10+5+2)×2=34