To be honest we're not 100% sure on this yet but you'll be the first to know when we do.
There are a few aspects to this cost:
1. Developing the film
2: Fulfillment (cutting the film out and placing in the wheel)
3: Packaging, labeling and posting (and matching up the images to the right addresses)
We know how much 1 costs, but 2+3 can vary wildly depending on order quantity, time and labour costs. Thus, we will have a better idea when we have refined our fulfillment process and got an efficient system in place.
We do know two things. The first is that we will make them as reasonably priced as we possibly can and the second is that the more of these you purchase in one order, the cheaper they will become. This is because we can put more than one wheel in each envelope, which saves us delivery and fulfillment costs.
If you have any more questions, feel free to ask.