B1单元格写入公式
=IF(A1="","",A1*0.56)
C1单元格写入公式
=IF(A1="","",IF(A1>4000,(A1-B1-A1*20)*0.2,IF(A1>1000,(A1-B1-800)*0.2,A1*0.3)))
我这个是对的
=IF(A1<1000,A1*0.3,IF(AND(A1>1000,A1<4000),(A1-B1-800)*0.2,IF(A1>4000,(A1-B1-A1*0.2)*0.2,"")))
=if(A1<=1000,A1*0.3,if(A1<=4000,(A1-B1-800)*0.2,(A1-B1-A1*20)*0.2))