min=3.7*x1+5*x2+1.5*x3+1.3*x4+3.1*x5+3.5*x6+1*x7+1*x8+1.5*x9+1.9*x10+1.7*x11+1.6*x12+@if(x1#le#40,0,(x1-40)*4.1)+@if(x2#le#30,0,(x2-30)*5.3)+@if(x3#le#30,0,(x3-30)*1.8)+@if(x4#le#30,0,(x4-30)*1.6)+@if(x5#le#40,0,(x5-40)*3.5)+@if(x6#le#30,0,(x6-30)*3.8)+@if(x7#le#30,0,(x7-30)*1.3)+@if(x8#le#30,0,(x8-30)*1.3)+@if(x9#le#40... |