Four automobiles have entered Bubba's Repair Shop for various types of work, ranging from a transmission overhaul to a brake job. The experience level of the mechanics is quite varied, and Bubba would like to minimize the time required to complete all of the jobs. Me has estimated the time in minutes for each mechanic to complete each job. Billy can complete job I in 500 minutes, job 2 in 130 minutes, job 3 in 90 minutes, and job 4 in 120 minutes. Taylor will finish job 1 in 450 minutes, job 2 in 100 minutes, job 3 in 90 minutes, and job 4 in 140 minutes. Mark will finish job 1 in 580 minutes, job 2 in 110 minutes, job 3 in 80 minutes, and job 4 in 180 minutes. John will complete job 1 in 600 minutes, job 2 in 160 minutes, job 3 in 100 minutes, and job 4 in 110 minutes. Each mechanic should be assigned to just one of these jobs. What is the minimum total time required to finish the four jobs? Who should be assigned to each job