The following data represent the monthly phone use, in minutes, of a customer enrolled in a fraud prevention program for the past 518 380 385 443 20 months. The phone company decides to use the upper fence as the cutoff point forthe number of minutes at which the 309 316 548 533 customer should be contacted. What is the cutoff point? 370 423 443 318 539 528 382 416 350 409 316 344 The cutoff point is minutes. (Round to the nearest minute.)