How do I print a different variable dependent on multiple quantity variables (and math)? - bash

Question

Source File Input (.csv):
TOTAL FULL PARTIALORDER FULLORDER DEVICENAME
10 2 123456 456789 OHWIL8499IPM101
8 0 345678 789605 OHCIN8499IPM102
TOTAL= Is the total number of devices for a full and partial order.
FULL = A different order but of same location.
PARTIAL/FULL ORDER = Order numbers. I need to print one after each device name.
Requirement/Goal:
I need to subtract FULL from TOTAL. If there is a difference I need to change the order number variable on the last (# OF FULL) device names printed.
If there are 10 total and 2 full I need 8 devices printed OHWIL8499IPM101 through OHWIL8499IPM108 followed by the partial order number. Then OHWIL8499IPM109-110 followed by the full order number. In the input file example above the second line doesn't have a difference so I only need to print the partial order number.
Desired Output File (.csv):
DEVICENAME ORDERNUMBER SHIPDATE TYPE SYSTEMSKU
OHWIL8499IPM101 123456 ASAP PROJECT1 12345678
OHWIL8499IPM102 123456 ASAP PROJECT1 12345678
OHWIL8499IPM103 123456 ASAP PROJECT1 12345678
OHWIL8499IPM104 123456 ASAP PROJECT1 12345678
OHWIL8499IPM105 123456 ASAP PROJECT1 12345678
OHWIL8499IPM106 123456 ASAP PROJECT1 12345678
OHWIL8499IPM107 123456 ASAP PROJECT1 12345678
OHWIL8499IPM108 123456 ASAP PROJECT1 12345678
OHWIL8499IPM109 456789 ASAP PROJECT1 12345678
OHWIL8499IPM110 456789 ASAP PROJECT1 12345678
Current Script:
#!/bin/bash
currentUser=$(/bin/ls -la /dev/console | /usr/bin/cut -d ' ' -f 4)
LOGFILE="/Users/$currentUser/Desktop/kit.csv"
SRCFILE="/Users/$currentUser/Desktop/input.csv"
orderFull=$(cat "$SRCFILE" | sed 's/,/ /g' | awk '{print $4}')
orderPartial=$(cat "$SRCFILE" | sed 's/,/ /g' | awk '{print $3}')
device_name=$(cat "$SRCFILE" | sed 's/,/ /g' | awk '{print $5}')
quantityNum=$(cat "$SRCFILE" | sed 's/,/ /g' | awk '{print $1}')
quantityFull=$(cat "$SRCFILE" | sed 's/,/ /g' | awk '{print $2}')
shipDate=ASAP
projectType=Project1
systemSku=1235678
number=$(echo "$device_name" | head -c 9| tail -c 4)
max_sequence_name=$()
max_sequence_num=$(echo $max_sequence_name | rev | cut -c 1-3 | rev)
if [ -z "$max_sequence_name" ];
then
max_sequence_name=device_name
max_sequence_num=100
fi
array_new_sequence_name=()
for i in $(seq 1 $quantityNum);
do
cnum=$((max_sequence_num + i))
array_new_sequence_name+=($(echo $device_name$cnum))
done
for sqn in ${array_new_sequence_name[#]};
do
echo "$sqn,$orderNumber,$shipDate,$projectType,$systemSku,$number" >> $LOGFILE
done
So far I have the following code I've been attempting to start with but am unsure if I'm on the right track or not.
if [ "$quantityFull" = 0 ]; then
orderNumber=$(echo "$orderPartial")
else
math=$(expr $orderPartial - $orderFull)
#ENTER CODE HERE TO DETERMINE WHICH NAMES TO CHANGE ORDER NUMBER ON
orderNumber=$(echo "$orderFull")
fi
Once this can be determined where would I place it in the above script? Or is there an easier way of implementing this somehow? If you need additional information please let me know.