For a limited time (11/27 - 12/2), free shipping is available on orders over $100 within the contiguous United States. While Limited Quantity Hazardous items (like some photo chemistry and some items containing batteries) are not eligible for free shipping, their cost still contributes toward reaching the $100 free shipping threshold. Eligible items in the same order will receive free shipping once the $100 threshold is met. The non-eligible items in the order will incur a shipping charge, at a rate calculated using just those items.