I think the beer according to the project, after the number of sales you played, according to you is to do addition, you do not have a full one hundred barrels, and then presented an additional 10 barrels, that is, the more you do, the lower the cost-sharing. This time when selling, selling package, they should sell more. Because they allow customers to do maintenance, oil can be led away, this way I have the equivalent of a library, and customers do not care though, but the oil has been led away, I can be on my base has enlarged, the cost will down.
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