"For our workshops, we have enrollment fee and materials fee. And the enrollment fee is the cost of the class, whereas the materials fee, they pay it all in one, and it's for the supplies that will be used, basically, in the class. We offer a discount to our members on workshops and since materials fee can be pretty high in some cases, we'd like the discount to apply ONLY on enrollment fee but NOT on materials fee. So it would be about introducing some some of sub-ticket option and allow to create discount codes for these options only.