#!/usr/bin/perl
use strict;
use warnings;
my @series = qw(41234 9 67845 8 32543 10 84395 7 57543 9 23545 11 23545 1 23545 2 23545 6);
my $total_periods = 0;
my $total_hours = 0;
my %empwork;
while (my $series = shift @series) 
{
 my $nums = shift @series;
 $empwork{$series} += $nums;
}
print "Sorted Employee Numbers:\n";
foreach my $empnum(sort keys %empwork) 
{
 my $periods=0;
 $periods++;
 my $hours = 0;
 $hours += $empwork{$empnum}; 
 my $avg = $hours/$periods;
 $total_periods += $periods;
 $total_hours += $hours;
 print "$empnum\n$periods periods\n$hours hours\n$avg average\n\n";
}
my $grand_avg = $total_hours/$total_periods;
print "The number of work periods is $total_periods\n";
print "Total number of hours is $total_hours\n";
print "Average number of hours per work period is $grand_avg\n";