【Steven Chian】評論
邊際收益率=(銷貨收入-變動成本)/銷貨收入 = (100000-x)/100000 = 0.6 變動成本= 40000營運槓桿程度= 邊際收益 / 銷貨淨額 = (銷貨收入-變動成本)/ (銷貨收入-變動成本-固定成本) = (100000-40000) / (100000-40000-x) = 1.2得固定成本 = 10000