for my $size (@sizeOfTrees) {
            my $quant = $tree_collection{$years}{$trees}{$size} || "-";
            printf "%9s", "$quant";

            # { no warnings; $total += $quant; }    # WHY DO I NEED THIS?
        }

##</code><code>##

        for my $size (@sizeOfTrees) {
            my $quant = $tree_collection{$years}{$trees}{$size} || 0;
            printf "%9s", $quant || '-';

            $total += $quant;
        }

##</code><code>##

my $quantity        = ();
my $total_quantity  = ();

    my $total      = ();
    my $year_total = ();

##</code><code>##

            printf "%9s", "$quant";
        printf "%5s", "$total";
        printf "%9s", "$total_col{$i}";
    printf "%5s", "$year_total";