Perform an A$-$B$-$C classification of inventory analysis on the inventory items shown below. How would you use your classification in practice?

$\backslash$table$[[$Ttem$,\backslash$table$[[$Annual$],[$Demand$]],\backslash$table$[[$Unlt$],[$Cost$]]],[$AA$,700,100],[$AAB$,1107,250],[$AAS$,654,110],[$BCT$,606,112],[$BHY$,1099,113],[$C$,978,26],[$CCDFC$,583,122],[$CDE$1,1200,200],[$DDE$1,1500,130],[$DDE$,510,60],[$DDS$,797,120],[$DER$,1085,40],[$DET$,849,58],[$CGO$,672,30],[$GGR$,1088,110],[$GTY$,700,150],[$HJUI$,779,149],[$IOP$,1546,455],[$KLI$,2500,177],[$LLQ$,1053,90],[$NNBG$,1120,10],[$POR$,628,170],[$QRT$,1066,27],[$QWE$,262,44],[$QWI$,535,34],[$RTI$,3000,1100],[$SDE$,918,130],[$SDF$,960,112],[$SET$,1030,35],[$TRW$,451,22],[$TYU$,950,79],[$VCD$,1170,58],[$WER$,750,107],[$WWQ$,880,29],[$WWR$,221,80],[$XAE$,1100,130],[,,]]$

$3$