I am running 1.9.3.2 with the Argento theme. My question is that we sell some products that are classed as Dangerous goods and carry a flat rate fee from the shipping company of $5 per shipment, regardless of the size of the shipment. Normally my site uses the table rate to calculate the freight, but I would love to have a tick box that on the applicable products that carry a Dangerous goods surcharge to the order, then the fee would be added at checkout. I am very new to Magento, but is there such a thing built in?