3[单选题] 甲公司于10月4日到乙公司购买一批原料，当场提货并付款25万元。次日，甲公司因货物质量不合格，将这批原料退回乙公司，乙公司签收，但未退款。10月7日，甲公司到乙公司购买电器一批，价款28万元，提货时与乙公司约定2日内付款。2日期满，甲公司未付款，乙公司上门催收。甲公司认为前后债务相抵，只需支付3 000元。双方发生争议，下列对此案的处理意见中哪

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3[单选题]
甲公司于10月4日到乙公司购买一批原料，当场提货并付款25万元。次日，甲公司因货物质量不合格，将这批原料退回乙公司，乙公司签收，但未退款。10月7日，甲公司到乙公司购买电器一批，价款28万元，提货时与乙公司约定2日内付款。2日期满，甲公司未付款，乙公司上门催收。甲公司认为前后债务相抵，只需支付3 000元。双方发生争议，下列对此案的处理意见中哪项是正确的？（）

A.甲公司应先付给乙公司28 000元，再请求乙公司退款25 000元

B.乙公司应先退给甲公司25 000元，再请求甲公司付款28 000元

C.甲公司付给乙公司3 000元，双方了结债务

D.甲公司应付给乙公司14 000元，待乙公司退款之后，再付给14 000元

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