427 330 327 517 638 318 301 417 302 514 500 415 473 463 430 618 379 444 415 minutes. The following data represent the monthly phone use, in minutes, of a customer enrolled in a fraud prevention program for the past 20 months. The phone company decides to use the upper fence as the cutoff point for the number of minutes at which the customer should be contacted. What is the cutoff point? (Round to the rearst minute) The cutoff point is