#!usr/bin/perl
use strict;
use warnings;
use Data::Dumper;

my %HoA;  # a Hash of Array

while (my $line = <DATA>)
{ 
   my ($bucket, $num) = $line =~ m/^\s*(\d+)\s*\|\s*(\d+)/;
   push @{$HoA{$bucket}},$num;
}


my $total;

foreach my $key (sort {$a<=>$b} keys %HoA)
{
   my $line_total;
   
   foreach my $num (@{$HoA{$key}})
   {
      $line_total += $num;
   }
   
   print "Line $key total = $line_total\n";
   $total += $line_total;
}
print "Grand Total = $total\n";

=Prints
Line 1 total = 150
Line 2 total = 75
Line 3 total = 55
Grand Total = 280
=cut

__DATA__
1|10
1|20
1|30
1|40
1|50
2|15
2|25
2|35
3|1
3|2
3|3
3|4
3|5
3|6
3|7
3|8
3|9
3|10