For exchanges that may not be an "equal" swap, users can barter an extra amount of cash to make the trade equal.
由于交换可能是不等价的，用户可以额外收取一定的费用以使交易公平。
The prices of the barter trade transactions taxpayers shall not be included in the sales amount of renewable resources settled through the financial institution.
纳税人之间发生的互抵货款，不应计入通过金融机构计算的再生资源销售额。
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