Well, you could try adding those items to the shopping cart and then enter the sale-code and see if it discounts it. You'll see the price change before you confirm anything.
I ordered a few things last night. I had been planning to get chausses (2 pairs) and braies anyway, and was thinking about a 14th century tunic, so I went ahead and got those and ordered a liripipe hood to go with it as well. Not bad. Saved probably about $60, so it's like getting one of those items for free.