Hi Karen,
Our pricing is heavily dependent on shipping costs. Every quantity is priced according to the shipping cost for that quantity. We have over 100 sku's and many of our skus have 5+ levels of pricing.
They also almost all have totally different shipping and product costs (and the shipping costs vary by price tier and shipping zone). For these reasons, it takes us a considerable amount of time to price each item.
As a result, we price all of our products as low as possible from the get go to avoid having to constantly review pricing.
I hope this helps clarify things.