State the final job sequence, idle time, and total time to complete all jobs.

Table 14.6 contains eight laboratory jobs (listed by job number) that must complete the two back-to-back processes of heating and then extraction. The times in minutes are listed for the heating and extraction processes for each job. Use Johnson’s rule to sequence the jobs. State the final job sequence, idle time, and total time to complete all jobs.

TABLE 14.6 Laboratory Jobs Processing Times

Job

Heating

Extraction

R451

60

89

R462

101

67

R773

57

31

R673

37

43

R351

19

87

R262

91

27

R873

49

71

R551

25

100

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