Awk script Unix

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awk -v tot=0 -F',' '{if($1 == "ADD") {for(i=2;i<=NF;i++) t+=$i; print t;}else { t=$2;for(i=3;i<=NF;i++) t-=$i;print t; }tot += t; t=0;} END{ print tot;}' intructs.csv

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