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