Stanley wrote a business plan for an entrepreneurship class, and now he has to make bound copies. Stanley could use a printer who charges a setup fee of $50 and $4 for every copy printed. Another possibility is to go to the office supply store, where he could pay an up-front fee of $30 and $8 per copy. There is a certain number of copies that makes the two options equivalent in terms of cost. How much would the copies cost?