省電費累計:台幣0圓+1,800圓=1,800圓
省電費累計:台幣1,800圓+100圓=1,900圓
296,987KM-188KM=296,799KM
https://www.wealth.com.tw/articles/0aa1423a-77cf-4bcc-b518-54cff0e6cc7f
297,935KM-948KM=296,987KM