As we have volume-based pricing, the cost per person we vaccinate does decrease as the number of people at each clinic increases.  For clinics of differing sizes, this means that the cost for one location may be different from another location.  For example, you may have a large location where we are vaccinating 100 staff and then another location where we are vaccinating 40 staff. Instead of charging two different prices for these clinics, we simply average the number of vaccinations for these two clinics and then base our fees on this average.  So in this example, the average number of vaccinations was 70 per location and this determines the price for your program with all the vaccines administered to your staff being at the same price.