%HoH = (
        cat => {
                'FY2003-Q2' => {
                        'this is the customers data => '1'
                        },
                'FY2003-Q4' => {
                        'this is the customers data => '1'
                        },
                'FY2004-Q1' => {
                        'this is the customers data => '1'
                        },
                'FY2004-Q2' => {
                        'this is the customers data => '1'
                        },
        },
        dog => {
                'FY2003-Q2' => {
                        'this is the customers data => '1'
                        },
                'FY2003-Q1' => {
                        'blah blah blah' => '1'
                },

        },
        catdog => {
                'FY2004-Q1' => {
                        'blah blah blah' => '1'
                },
                'FY2004-Q2' => {
                        'blah blah blah' => '1'
                }
        }
);

##</code><code>##

my %date_slots = (
        1 => FY2003-Q2,
        2 => FY2003-Q3,
        3 => FY2003-Q4,
        4 => FY2004-Q1,
        5 => FY2004-Q2
);

##</code><code>##

foreach $customer (keys %HoH) {
        print "$customer\n";
        foreach $date (keys %{$HoH{$customer}} ) {
                print "\t\t$date";
                foreach my $data (keys %{$cal{$customer}{$date}} ) {
                        print " = $data\n";
                }
        }
}

##</code><code>##

cat
        FY2003-Q2 = blah blah blah
        FY2003-Q4 = blah blah blah
        FY2004-Q1 = blah blah blah
        FY2004-Q2 = blah blah blah
dog
        FY2003-Q1 = blah blah blah
        FY2003-Q2 = blah blah blah
catdog
        FY2004-Q1 = blah blah blah
        FY2004-Q2 = blah blah blah

##</code><code>##

cat
        FY2003-Q2 = blah blah blah
        FY2003-Q3 = no data
        FY2003-Q4 = blah blah blah
        FY2004-Q1 = blah blah blah
        FY2004-Q2 = blah blah blah
dog
        FY2003-Q2 = blah blah blah
        FY2003-Q3 = no data
        FY2003-Q4 = no data
        FY2004-Q1 = no data
        FY2004-Q2 = no data
catdog
        FY2003-Q2 = no data
        FY2003-Q3 = no data
        FY2003-Q4 = no data
        FY2004-Q1 = blah blah blah
        FY2004-Q2 = blah blah blah