valavanp, I think this is what you wanted: 
$a="ABC";
$b=length($a);
print "$b\n";
for($i=0;$i<$b;$i++){
$a=~s/(\d+)(.)/$2 x $1/ge;
}
print "$a\n";
my %value = (
    A => 2.74,
    B => 2.64,
    C => 2.5,
);

my %factor = (
    A => 50/100,
    B => 55/100,
    C => 60/100,
);

my @letters = split //, $a;
my $result = 1;
my $temp=0;
for my $letter (@letters) {
   $result *= $value{ $letter };
#print "$result\n";
};
my %seen;
my @uniqed = grep !$seen{$_}++, @letters;
for my $letter (@uniqed) {
   $result *= $factor{ $letter };
#print "$result\n";
};
print $result;

[download]
*UPDATE*
I did not refresh my browser before I posted, it appears the two post before this get the same results...

In reply to Re: regex and string functions help needed. by doowah2004
in thread regex and string functions help needed. by valavanp

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.