A—cost price J—guaranteed priceB—factory price K—cash priceC—net price L—market priceD—price free on board M—preferential priceE—purchase price N—piece priceF—sale price O—price controlG—wholesale price P—maximum priceH—retail price Q—minimum price I—fixed priceExamples：(M)优惠价 (K)现金价格

填空题 ( )进货价格 ( )出厂价

填空题 ( )批发价 ( )单位价格

填空题 ( )固定价格 ( )最高价

填空题 ( )市场价 ( )船上交货价

填空题 ( )销售价格 ( )成本价