https://youtu.be/cKtmrxYmF60?si=Ci37HkEmS9AQWQWx
https://youtu.be/C2NHzcaqFJc?si=aGHTzZ_maZB31umC
https://youtu.be/4bC_R4OrdeU?si=8atq-5m0fbg9figq
https://youtu.be/gGiAFJZdpow?si=yRX4koM66bf6toqW
省到水電：Bal b/f TW$27,740+TW$365=TW$28,105 Bal c/f
