[biker訊-yamaki油價週報] 12/13油價跌0.4元
一樣 這週還是在驗證期 不過照上周結果推斷公式可能還算正確
1128~1204 1205~1211
原油價格 44.35 39.5
匯率 33.442 33.5
兩者相乘 1483.153 1323.25
以相乘的漲跌幅打八成 得到 -8.63%
92基準未稅油價 12.32 乘以 0.9137 = 11.26
11.26 加上調整過後的稅金 8.66 = 19.92
19.92 乘以5%的營業稅 = 20.916 四捨五入為 20.9
20.9 - 20.5 = 0.4 0.4 - 1.6 = -1.2
-1.2/3 = -0.4 四捨五入為 -0.4
這次我把三分之一和四捨五入狀況都考慮進去了
所以除非油價有很大變動 否則幅度應該可以先確定
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