the breakeven volume is ? patients

Dr. Gulakowicz is an orthodonist. She estmates that adding two new chairs wit increase fored costs by $152,000, induding the annual equivalent cost of the capital investrnent and the salary of one more techniclan. Each new patient ls expected to bring in $2,990 per year in addsonat revenue, wat variable costs estimated at $990 per potient. The two new chairs witl allow Dr Outakowice to expand hec practice by as many as 165 patents annually How many patents would have to be addod for the new process to break even? The break-even volume is patents. (Entor your response round to the noarost whole number)