Please purchase $50 CAD of additional postage to cover the shipment of your previous order. Currency conversion rates change daily; the Canadian dollar is about 30% cheaper than the US dollar at this time.
We strive to input the weight and dimension of products, but it is not usually possible to include the actual weight and dimensions of all Home Depot products. In addition, sometimes it is cheaper to breakup the order quantities to save on shipping charges for over-weight goods.
The flat rate shipping charge for the USA covers items that fit in either the small or medium sized USPS Priority Mail boxes.