If it costs the bakery owner $20 to keep the bakery open each hour (staff, electricity, etc.),

Question:

If it costs the bakery owner $20 to keep the bakery open each hour (staff, electricity, etc.), each customer spends $2.50, and customers arrive at the bakery at an average rate of 6 per half-hour, will the bakery be able to stay in business (i.e., will the bakery make more money than it spends in an hour)?