Ellen just opened her own hair salon and would like to get an idea of how much her typical customer pays. Below are listed the amounts (in dollars) that her last several customers paid. 133 , 154 , 99 , 95 , 89 , 167 , 50 , 111 , 81 , 127 Ellen has noticed that her tips correspond to the amount paid in the manner below: $ 20 tip if the customer spent under $ 140 , and $ 30 tip if the customer spent at least $ 140 . Use the TI-83 or 84 to draw a histogram for these values. Using that histogram, determine how much money in tips Ellen's customers gave total.