0I'm assuming that this phrase is used when there's a sale or special store promotion. It's a shortened version of "(If you) buy one, (you) get (another) one free". It's not exactly grammatically accurate but it would do.
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01cite10Teacher Eric12cite10I'm assuming that this phrase is used when there's a sale or special store promotion. It's a shortened version of "(If you) buy one, (you) get (another) one free". It's not exactly grammatically accurate but it would do. People easily understand it. Other versions include:12br
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101.