The average charge per item, worked out by dividing the total postage payable by the number of items in the posting, is subject to the minimum rates below.
每件邮件平均邮费受以下最低收费限制，每件邮件平均邮费的计算方法是为邮费除以邮件总数。
Output will consist of the called number, the time in minutes the call spent in each of the charge categories, the charging step and the total cost in the format shown below.
输出的每一行要包括拨出的号码，每一个话费阶段的分钟数，话费阶段编号以及总费用。并按如下格式输出。
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