with due apology ,matrixmadhan, for the inconvenience here it is in code tag .

Code:

My code is:
#!/bin/sh
tput clear
tput cup 8 5 
echo -n 'Enter the Minimum Amt :'
read c

awk -F: '{
idx = $2 SUBSEP $4 
arr[idx, ++arrCnt[idx]] = $0
}
END {
for ( i in arrCnt)
if ( arrCnt[i] > 1 )
for ( c=1; c<=arrCnt[i]; c++)
print arr[i,c],TDA[nam]
}' n2 | sort -t: +3 -4d> n3 

awk -F: '{
vou[nam]=$1
dob[nam]=$2
amt[nam]=$3
nam=$4
typ[nam]=$5
TDA[nam]+=$3
}
END {
for ( nam in TDA )
if ( TDA[nam] >= '$c' )
{
printf"%8d:%30s \n",TDA[nam],nam
}}' n3 | sort -t: -n +1 -2d > n4 

#awk -F"[ :]" ' NR==FNR { a[$4]=$0;next} a[$4] {print $0}' n4 n3 > n5

The filed seperator in the original data file is : , Anyway if , say the data required is for Amount more than 3000000 the result expected is as below :

CHA DOB AMOUNT NAME TYPE
37836452 1/13/1961 125000 ASHUTOSH 65
37836505 1/13/1961 500000 ASHUTOSH 49
37836455 1/13/1961 100000 ASHUTOSH 65
37836488 1/13/1961 250000 ASHUTOSH 75
37836473 1/13/1961 125000 ASHUTOSH 49
37836478 1/13/1961 250000 ASHUTOSH 49
37836519 1/13/1961 150000 ASHUTOSH 49
37836437 1/13/1961 500000 ASHUTOSH 49
37836461 1/13/1961 125000 ASHUTOSH 65
37836477 1/13/1961 250000 ASHUTOSH 65
37836486 1/13/1961 250000 ASHUTOSH 65
37836513 1/13/1961 500000 ASHUTOSH 65
37836431 1/13/1961 125000 ASHUTOSH 65 3250000

It should give full details of data.