Orders placed are only “submitted” for review. The wide range of products and associated different shipping costs make automating the entire process a nightmare. . Orders submitted for review are checked for stock and correct shipping tier selected, and then confirmed.
There is no such thing as free shipping, one way or another it must be paid for, either by the overall cost of products being raised to cover the costs, or some other strategy
The variability of purchases, and the wide range of the shipping costs can be confusing, a Brass Shim by itself can be mailed with a single regular stamp, ink samples require extra postage, and magazines require the maximum postage allowed before parcel post becomes the only option. Much research has been done, and Canada Post’s flat rate boxes have proven time and time again to be the most economical method of shipping. To make matters a little less confusing I have simply rounded the cost of those down to $20.00. Virtually any order can be shipped for $20, and if the order is larger than will fit, either due to size or weight alternate methods can be entertained.