题目内容
某建筑工程预计施工期限为2年，现有两个运送材料的方案A和B，A方案是自购运输设备，其投资额为10万元，年运行费用为7万元，估计该设备2年后退出使用时的价值为4万元。B方案是承包出去的方案，每年应支付承包费用折算至每年年末为18万元。若基准收益率为8%，则折算成现值B方案较A方案多支付费用( )万元。已知：(P/A，8%，2)=1.783， (P/F，8%，2)=0.8573。
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