Thank you so much for the direction and detailed explanation, its really helped to figure out the problem and fixed it, thanks again. I am novice to perl will catch up soon.

use strict;
use warnings;

my $month_total    = 0;
my $day_week_total = 0;
my $VAR1 = {
    'Adam' => {
        'days'  => 22,
        'weeks' => 5,
        'total' => 22
    },
    'Keas' => {
        'total'  => 114,
        'test'   => 2,
        'weeks'  => 8,
        'days'   => 107,
        'months' => 5
    },
    'Tim' => {
        'total'  => 4,
        'weeks'  => 5,
        'days'   => 3,
        'months' => 1
    },
    'Sum' => {
        'total'  => 440,
        'days'   => 365,
        'months' => 9
    }
  };

  for my $name ( sort keys %{$VAR1} ) { 
    for my $calen ( sort keys %{ $VAR1->{$name} } ) {
      if ( $name ne 'Sum' ) {
          if ( ($calen eq 'days') || ($calen eq 'weeks') ){
              $day_week_total += $VAR1->{$name}->{$calen} if ($VAR1->{
+$name}->{$calen});
          } elsif ( ($calen eq 'months') ){
              $month_total += $VAR1->{$name}->{$calen} if($VAR1->{$nam
+e}->{$calen});
          }
      }  
    }
  } 

print "\n day_total: $day_week_total —-- month_total: $month_total \n"
+;
[download]

Output: day_total: 150 —-- month_total: 6