My company sells approximately 40 different products. Each product is sold in full box quantities only (2, 5, 20, or 25 items per box) depending on the item purchased. We have the dimensional and actual weight for each full package. Currently we use Shipstation and the freight is calculated, aggregated, and shown within the Shipstation App when we create the label(s) by entering dimensions and then tying directly to our UPS account. It is not customer facing. I would like the most efficient and cost effective solution for making the shipping charge customer facing on the Shopify site before checkout. Can anyone suggest the simplest solution?