Suppose a youth has a part-time job in an ice cream shop. He receives $80 if he is called to work a full day and $40 if he is called to work a half-day. Over the past year, he has been called to work a full day an average of 8 days per month and a half-day an average of 14 days per month. How much can he expect to earn per day during a 30-day month?