Dear chakster, The probably implicite assumption is that Axel
inspect the received carts direct. But more logical seems to be
that he stores the received carts according to the receiving date.
Otherwise he would need to remember all the details, say,
12 months later when the cart get its ''turn''. This can explain why
he does not return direct those carts which he can't repair. He
obviously need to first inspect a cart before he can decide one way
or the other. But if the waiting time is , say, more than one year he
can't answer this question before his inspection.