[经] analysis of material quantity variance
cái liào shù liàng chā yì fēn xī ㄘㄞˊ ㄌㄧㄠˋ ㄕㄨˋ ㄌㄧㄤˋ ㄔㄚ ㄧˋ ㄈㄣ ㄒㄧ