This code give you the line numbers and each value for the passed phrase : (see output)

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

my $p = [ q{total Laptops produced:}, 
          q{total mice produced:} ];

sub search_phrase {
    my $total;
    $total->{ lc( (split)[1] ) } = undef for @{ $_[0] };

    my $i = 1;
    map {
        my ( $item, $count ) = (split)[ 1, 3 ];
        $item = lc $item;
        push @{ $total->{$item} }, $i . q{:} . $count
          if exists $total->{$item};
        $i++;  
    } <DATA>;

    return $total;
}

print Dumper search_phrase($p);

__DATA__
total Laptops produced: 60
total cpu sold: 57
total mice produced: 40
total cpu sold: 45
total Laptops produced: 68
total mice produced: 48
total cpu sold: 51
total printers produced: 19
total monitors produced: 149
[download]

Output:
$VAR1 = {
          'mice' => [
                      '3:40',
                      '6:48'
                    ],
          'laptops' => [
                         '1:60',
                         '5:68'
                       ]
        };
[download]

hth,
PooLpi