What surprised him was that the essence liquid could create two copies, which he didn't expect."Eight Jade Heart Spirit Pills. If sold at a low price, they should sell quickly," Schen Xiang took deep...減：營業成本 | 30 | 25 || 減：銷售費用 | 5 | 6 || 減：管理費用 | 8 | 10 || 營業利潤 | | |請用一句話概括該公司的營業利潤變化並解釋原因。Assistant: 該公司的營業利潤從2018年的7萬元增加到2019年的13萬元，增長了6萬元。原因是...