[经] weighted average contribution margin

jiā quán píng jūn chuàng lì lù ㄐㄧㄚ ㄑㄩㄢˊ ㄆㄧㄥˊ ㄐㄩㄣ ㄔㄨㄤˋ ㄌㄧˋ ㄌㄨˋ