Programming

cat file
text     text      600     80      text

while read line
do
let arg=$1
gawk '{{
        if ($3 < '$arg')  printf  "*%-10s %-8s   %2d   %5d    $ %8.2f\n", $1, $2, $3, $4, $5;
else
 printf "%-10s %-8s   %2d   %5d    $ %8.2f\n", $1, $2, $3, $4, $5 }}'

done < file

text     text      600     80      text     (Result of (2000-600)/80)

while read line
do
let arg=$1
let set=2000

gawk '{{
        if ($3 < '$arg')  printf  "*%-10s %-8s   %2d   %5d    $ %8.2f\n", $1, $2, $3, $4, $5, $6;
else
 printf "%-10s %-8s   %2d   %5d    $ %8.2f\n", $1, $2, $3, $4, $5 }}'

done < file

awk -v set="2000" '{printf("%s%8.2f\n", $0, (set-$3)/$4)}' file

let arg=$1
gawk < file '{{
        if ($3 <= '$arg')
{
set=2010
avg=($4/(set-$3))

printf "*%-10s %-8s   %2d   %5d    $ %8.2f", $1, $2, $3, $4, $5, $6
print  "  "avg
}
 else
 {
set=2010
avg=($4/(set-$3))

 printf "%-10s %-8s   %2d   %5d    $ %8.2f", $1, $2, $3, $4, $5, $6
print  "  "avg
}}

}'