An old school friend has reached out to you with a problem. She has successfully been running Filos Bakery in Washington DC for a few years, specializing in German baked goods. An Auntie Anne's is opening across the street next week and your friend is concerned about the impact on her thriving pretzel trade. Filos has a loyal base of local customers who love high quality pretzels (the marginal cost of each pretzel is $2 for Filos, due to the high quality ingredients!), but tourists may be enticed by Auntie Anne's prices and national brand recognition.

A classmate of yours specializing in marketing has identified that the monthly demand for Filos' pretzels after Auntie Anne's opens is