Hello Monks Seeking for wisdom I have this hash of hash where I have been asked to find sum of value when cost key is found. In this case 430, I was thinking some how mapping to find all the cost keys and iterating over to sum them. Sample 
use Data::Dumper;

my $VAR1 = {
          '153-1' => {
                        '19-4' => {
                                       'cost' => '6300.00',
                                       'cost2' => '630.00'
                        },
            '135-1' => {
                        '68-4' => {
                                       'cost' => '300.00',
                                       'cost2' => '130.00'
                        }
            },
             '1069-9' => {},
             '35-1' => {
                        '28-4' => {
                                       'cost' => '30.00',
                                       'cost2' => '10.00'
                        }
             },

          },
};


#%result =  map { "$_->{0} => $_->{2}" } $VAR1;
#print Dumper \%result;

[download]
I have tried using map but I am not able for find correct solution any guidance to reach my destination. Thank you in advance wise one!

In reply to Iterating over hash to find specific key to sum up the cost by vaitor15

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.