我部现优惠邮售三环出版社发行的全套教材：书五本、磁带24盘，收费145元，另加15%的保值邮费。

• Our department now provides a mail order service with a discount for a whole set of textbooks published by Sanhuan Press: 5 textbooks, and 24 tapes, the charge is 145 yuan. Additionally, there is a 15%25 shipping and handling fee.