1. Bima: "Hey Roby, you look sad, what's wrong?"
Roby: "My brother is hospitalized and needs a lot of money. so I want to sell my bike but I don't know who to sell it to."
Bima: "Condolences to your brother, how much did you sell your bike for? I see your bike is a famous brand"
Roby: "I bought it for 30 million rupiahs but I'll sell it for 20 million rupiahs"
Bima: "I can help you, Roby. I'll send the money to your account; my son wants to have a bicycle"
Roby: "Really? Thanks, Bima, yes I'll send the account"
What is the problem of Roby?