Using$$ Johnson's rule for$2-$machine scheduling, the sequence$$ is:

Scheduled Order

Job

$1$

$$

F

A

C

B

D

E

Part $2$

$2$

$$

D

A

C

F

E

B

Part $3$

$3$

$$

A

C

D

B

F

E

Part $4$

$4$

$$

D

C

A

B

F

E

Part $5$

$5$

$$

A

E

B

C

D

F

Part $6$

$6$

$$

D

A

B

C

E

F

Part $7$

For the schedule developed using$$ Johnson's rule, the total length of time taken to complete the six jobs$($including the $2$nd$$ operation$)=$

$$

enter your response here hours $($enter your response as a whole$$ number$).$