September: 11,228.38 yuan2021:+23,432.42 yuanAnother solution
This month's profit: +6912.15 yuanJanuary:-13,296.2 yuanFebruary: -5741.46 yuan
This year's profit:-17,640.13 yuanJanuary:-13,296.2 yuanAugust: -5766.84 yuan
Strategy guide
Strategy guide 12-13