my $package = 'normal';
foreach my $type (qw(normal pckg_A pckg_B)) {
    $mwt_pckg->Radiobutton(
        -text     => "  $type", #modified here as you suggested.
        -value    => $type,
        -variable => \$package,
#)->grid(-sticky => 'w', -column => 1, -row => 2);
	)->grid(-sticky => 'w', -column => 1, -row => 2, -columnspan=>20, -padx => 50, );