Mogu li platiti gotovinom? means “Can I pay cash?” – and it consists exclusively of building blocks you already know.
The waitress asks whether the money will still be good tomorrow, otherwise it will be a burden on her pocket, and you put it on the plate with the two animals: mogu li platiti. Then she drives off in the go-kart through the gate, waving her notes and almost into the wall: gotovinom.
Four sentences, two verbs, two means of payment – the combinations can be swapped freely.