#Parameters Group 1:
my $x = 1;
my $y = 2;
my $z = 3;

#Parameters Group 2:
my $x = 3;
my $y = 4;
my $z = 5;

#Parameters Group 3:
my $x = 1;
my $y = 1;
my $z = 1;

##</code><code>##

sub main
{
    my  ($x,$y,$z)  = @_;
    my %final_hash;
    
    #  Something like this???
    #  I'm totally lost here 
    #  $final_hash{$paramgroup} = add_them($x,$y,$z);  

    return %final_hash;
}


sub add_them
{
    my  ($x,$y,$z)  = @_;
    return ($x+$y+$z);
}

##</code><code>##

$result = {
             'ParamGroup1' => 6,  # 1+2+3
             'ParamGroup2' => 12, # 3+4+5
             'ParamGroup3' => 3,  # 1+1+1
          };