you can store values in a array of arrays like,

my @store;
for my  $worksheet ( $workbook->worksheets() ) {
 my ( $row_min, $row_max ) = $worksheet->row_range();
 my ( $col_min, $col_max ) = $worksheet->col_range();

    for my $row ( 0.. $row_max ) {

     my @required_col = (0,1,2);
      my @values_store;
      for my $col(@required_col){

            my $cell = $worksheet->get_cell($row, $col );
            next unless $cell;
            print "$row, $col\n";
            print $cell->value(),"\n";
            #store values in a array
            push(@values_store, $cell->value());
           # print "Unformatted = ", $cell->unformatted(), "\n";
            print "\n";
        }
        #push array ref into array
        push(@store, [@values_store]);
    }
}
print Dumper(\@store);
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Output like:

$VAR1 = [
          [
            'Test',
            'Excel',
            'hello'
          ],
          [
            'hello ',
            'test',
            'PerlMonks'
          ]
        ];
[download]