You are planning to take on a part time job as a waiter at a local restaurant. During your interview, the boss told you that their best waitress, Betty, made an average of $70 a night in tips last week. However, when you asked Betty about this, she said she made an average of only $50 per night last week. She provides you with a copy of her nightly tip amounts from last week: Day Tip Amount Sunday $50 Monday $45 Wednesday $48 Friday $125 Saturday $85 Calculate the mean and median tip amount. Which value did Betty's boss use to describe the average tip? Which did Betty use?