A machine shop has seven jobs to be processed through a two-step process. The processing times in hours for each job for each operation are given in the following table. Determine the job sequence that will minimize the total time required to complete the jobs:

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Step 1 Step 2 Job Processing Time Processing Time 1.50 1.00 2.40 1.70 1.40 1.20 1.90 1.70 1.80 2.00 1.60 2.00 1.55 1.70