[biker訊-yamaki油價週報] 02/28油價跌0.0~0.1元
0213~0219 0220~0226
原油價格 42.02 41.42
匯率 34.455 34.75
兩者相乘 1447.799 1439.345
以相乘的漲跌幅打八成 得到 -0.47%
92基準未稅油價 12.17 乘以 0.9953 = 12.11
12.11 加上調整過後的稅金 9.76 = 21.87
21.87 乘以5%的營業稅 = 22.96 四捨五入為 23.0
23.0 - 22.6 = 0.4 0.4 - 0.4 = -0.0
-0.0/2 = -0.0 四捨五入為 -0.0
這種算法 老實說 還真絕 一路四捨五入都是零 要嘛進位 要嘛就掛蛋
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