Homework & Coursework Questions

PRE_LBNO=0
PRE_DATE=0
TOT_PAY=0
TOT_REM=0
TOTAL=1
for Record_Type in `cut -c 1 Inputt.dat`
do
if [ $Record_Type = 'P' ];
then 
CURR_LBNO=` cut -c 46-50 Inputt.dat`
CURR_DATE=` cut -c 59-68 Inputt.dat`
PAY_AMT=` cut -c 69-79 Inputt.dat`
elif [ $Record_Type = 'R' ];
then 
REM_AMT=` cut -c 22-32 Inputt.dat`
fi
if [ "$PRE_LBNO" = "$CURR_LBNO" -a "$PRE_DATE" = "$CURR_DATE" ] || [ "$PRE_LBNO" = 0 -a "$PRE_DATE" = 0 ];
then
TOT_PAY=`expr $TOT_PAY + ${PAY_AMT}`
else
TOT_PAY=${PAY_AMT}
fi
if [ "$PRE_LBNO" = "$CURR_LBNO" -a "$PRE_DATE" = "$CURR_DATE" ] || [ "$PRE_LBNO" = 0 -a "$PRE_DATE" = 0 ];
then
TOT_REM=`expr $TOT_REM + ${REM_AMT}`
else
TOT_REM=${REM_AMT}
fi
if [ "$PRE_LBNO" = "$CURR_LBNO" -a "$PRE_DATE" = "$CURR_DATE" ];
then
TOTAL=`expr $TOTAL + 1`
else
TOTAL=${TOTAL}
fi
echo ${TOTAL}"|"${TOT_PAY}"|"${TOT_REM}"|"${CURR_LBNO}"|"${CURR_DATE} >> totals.txt
PRE_LBNO=`echo ${CURR_LBNO}`
PRE_DATE=`echo ${CURR_DATE}`
done