Direct from the hospital: ¥480 (one sheet of letter paper) + ¥120 (envelope with address) + ¥110 (stamp) = ¥710 Additional letters (5 sheets): ¥200 per sheet x 5 sheets = ¥1000 Envelopes with address only: ¥120 x 5 envelopes = ¥600 Total: ¥2310