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【单选题】
某企业生产A产品需要用甲材料。本期购入甲材料3500千克,实际耗用2970千克,其标准用量为3080千克。甲材料实际价格为26.1元/千克,标准价格为26.8元/千克。则甲材料的价格差异额。A.
-2079元
B.
-2948元
C.
5079元
D.
-5089元
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