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? 431 407 447 345 467 532 494 333 337 443 352 332 381 485 421 332 419 311 400 362 The cutoff point is minutes. (Round to the nearest minute.)