Letters may be carried without paying postage.Logical formLearned from2 sentences. A signature can be on a (postage statement).Logical formLearned from2 sentences. Refunds may be given for postage.Logical formLearned from2 sentences. A postage can be equal to a (single-piece rate).Logical formLearned from2 sentences. Postage may be paid by a (corporate account).Logical formLearned from2 sentences. A piece may be delivered without a collection of (postage dues).Logical formLearned from2 sentences. A piece may be rated as (postage dues).Logical formLearned from2 sentences. A (postage rate) may vary by zone.Logical formLearned from2 sentences. Credit can be for postage.Logical formLearned from2 sentences. A postage may undergo a use.Logical formLearned from2 sentences. A postage can be at a rate.Logical formLearned from2 sentences. Some postage can be valid.Logical formLearned from2 sentences. A (postage charge) can be for a class of mail.Logical formLearned from2 sentences. A (postage affixed) may equal a (postage charge).Logical formLearned from2 sentences. Postage may be paid with stamps.Logical formLearned from2 sentences.