Hi guys ,

I just installed zencart 1.5.1 and auspost shipping module.
I have many kind products. And their weight various. some products are 5 kg. some products 120 kg.

if the product is over 20 kg, the shipping module can not calculate properly and it shows 'Error cost value' on Checkout page.

How can I calculate the proper shipping price for which product is over 20 kg?