This was what I was missing last night! I kept trying to say if $wt/abs($wt) and it was dying in the 0 case, but by turning the 0 to $min in the possible total and then checking $total/abs($total) that solved. it. Thank you.

        $total = ($wt || $min) * $price;
        $total = $total/abs($total) * $price * $min if abs($wt) < $min
+;
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