VarianceAnalysis-ActualvsTarget(Oxygen)MonthlyVarianceCalculation(Totalwon)MonthTotalGap(won)VolumeVariance(won)199901-28,525,649-11248703.9902114199902-20,799,675-1861096.8512651199903-82,436,505-54147179.4900958199904-79,035,297-30890372.4988096199905-135,862,812-135862812.179548199906-130,817,359-130817358.503161199907-119,876,826-119876825.768702199908-109,307,332-109307332.180972199909-108...