For those of you who took the time to read my post, thank you and here is one way of doing it. Although I would have preferred to use awk for this task (due to my limited awk exposure) I had to use regular shell scripting to achieve my goal (thnx to JustIce for showing me how to convert this to a delimited file). Here goes.

#! /usr/bin/ksh

#Typecast the count variables as integers
typeset -i prev_asnerror
typeset -i prev_asntotal
typeset -i curr_asnerror
typeset -i curr_asntotal
typeset -i print_asnerror
typeset -i print_asntotal

#Initialize all temporary files required for merge process
> ./asn2spr.d 2>/dev/null
> ./asn2spr.sort 2>/dev/null
> ./asn2spr 2>/dev/null
> ./230240.txt

# Assuming the data files are all present in the 240 folder
cat 230.txt 240.txt >> asn2spr #Combine 230 and 240 files together
sort asn2spr > asn2spr.sort #Sort the combined file to get input data sorted by Supplier and location

for line in `< asn2spr.sort`
do
col1=`echo $line | cut -c1-6`
col2=`echo $line | cut -c7`
col3=`echo $line | cut -c8-15`
col4=`echo $line | cut -c16-22`
col5=`echo $line | cut -c23-29`
echo "$col1|$col2|$col3|$col4|$col5" >> asn2spr.d #Create the Delimited temporary file of the input data
done

first=1
supplier_match=0
while read line
do
if [ "$first" -eq "1" ] ;
then first=0
prev_header=`echo $line|awk -F "|" '{print $1$2}'`
prev_supplier=`echo $line|awk -F "|" '{print $3}'`
prev_asnerror=`echo $line|awk -F "|" '{print $4}'`
prev_asntotal=`echo $line|awk -F "|" '{print $5}'`
# Set the print columns for the first read
print_asnerror=`echo $line|awk -F "|" '{print $4}'`
print_asntotal=`echo $line|awk -F "|" '{print $5}'`
continue
fi
curr_supplier=`echo $line|awk -F "|" '{print $3}'`
curr_asnerror=`echo $line|awk -F "|" '{print $4}'`
curr_asntotal=`echo $line|awk -F "|" '{print $5}'`
if [ "$prev_supplier" -eq "$curr_supplier" ] ;
then
supplier_match=1
print_asnerror=`expr $prev_asnerror \+ $curr_asnerror`
print_asntotal=`expr $prev_asntotal \+ $curr_asntotal`
else
# Set the print values for the previous record
if [ "$supplier_match" -eq "0" ] ;
then
print_asnerror=$prev_asnerror
print_asntotal=$prev_asntotal
fi
printf "%7s %8s %07d %07d\n" $prev_header $prev_supplier $print_asnerror $print_asntotal | sed 's/ //g' >> 230240.txt
prev_supplier=`echo $line|awk -F "|" '{print $3}'`
prev_asnerror=`echo $line|awk -F "|" '{print $4}'`
prev_asntotal=`echo $line|awk -F "|" '{print $5}'`
let print_asnerror=0
let print_asntotal=0
supplier_match=0
fi
done < asn2spr.d
# Set the print values for the previous record for last record
if [ "$supplier_match" -eq "0" ] ;
then
print_asnerror=$prev_asnerror
print_asntotal=$prev_asntotal
fi
printf "%7s %8s %07d %07d\n" $prev_header $prev_supplier $print_asnerror $print_asntotal | sed 's/ //g' >> 230240.txt
rm -f ./asn2spr.d 2>/dev/null
rm -f ./asn2spr.sort 2>/dev/null
rm -f ./asn2spr 2>/dev/null

Thanks
Jerardfjay