use Data::Dumper qw/Dumper/;

my $xls_path = "c:/path_to_xls.xlsx";
my $xls = $excel->Workbooks->Open("$xls_path");     

foreach my $sheet ( in $xls->Worksheets ) 
{
    $San ={};
    $San->{name} = $sheet->Name, $/;    
    
    my $San_data = $xls->Worksheets("$San->{name}");
    my @Colum_A = $San_data->UsedRange->{'Value'};

    ## what datastructure are we working with?
    print "SAN : $San->{name}\n";
    print Dumper \@Colum_A;
}