单项选择题

某技术方案年设计生产能力为20万t，年固定成本2200万元，产品销售单价为1200元／t，每吨产品的可变成本为800元，每吨产品应纳营业税金及附加为180元，则该产品不亏不盈的年产销量是（）万t。 A．10．00B．3．55C．5．50 D．20．00

A.10．00B．3．55C．5．50
B.20．00

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