The budget of the production is shared between the producing company and the broadcaster, with the broadcasting channel covering around 50% of expenses usually. If top stars and famous scriptwriters are employed, they may cover even more. The rest of the budget has to be brought in by the production company with the help of sponsors. In the case of product placements, income is shared by the producer and the channel. The channel keeps 100% of the advertisement income during airtime; this could amount to ₩300-400 million. A typical Korean drama may cost as much as ₩250 million per episode, and historical dramas cost more than that. For example, "Gu Family Book" cost ₩500 million per episode.