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MGSM / 亚琳娜订阅了流媒体服务,每年的费用是 140 美元。如果流媒体公司对她收取上半年费用的初始金额,然后对她下半年的费用少收 10%,请计算到年底她为流媒体服务支付…

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亚琳娜订阅了流媒体服务,每年的费用是 140 美元。如果流媒体公司对她收取上半年费用的初始金额,然后对她下半年的费用少收 10%,请计算到年底她为流媒体服务支付的总金额。

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