if(订货点>3000,"超3000的值",if(订货点>2500,(3000-订货点)*0.05,if(订货点>2000,(3000-订货点)*0.05+(3000-订货点)*0.1,if(订货点>2000,(3000-订货点)*0.05+(2500-订货点)*0.1+(2000-订货点)*0.2,if(订货点>1500,(3000-订货点)*0.05+(2500-订货点)*0.1+(2000-订货点)*0.2+(1500-订货点)*0.55,if(订货点>1000,(3000-订货点)*0.05+(2500-订货点)*0.1+(2000-订货点)*0.2+(1500-订货点)*0.55+(1000-订货点)*0.1,"低于100的值"))))))