The Average Flow Time for the Jobs Listed in the Table

Multiple Choice

The average flow time for the jobs listed in the table below under the longest processing time (LPT) rule is ______. $$\begin{array} { | c | c | c | } \hline \text { Job } & \begin{array} { c } \text { Processing time } \\\text { (in days\} }\end{array} & \begin{array} { c } \text { Due date (in days from } \\\text { today's date\} }\end{array} \\\hline \text { A } & 4 & 9 \\\hline \text { B } & 10 & 18 \\\hline \text { C } & 6 & 6 \\\hline \text { D } & 12 & 19 \\\hline \text { E } & 7 & 17 \\\hline\end{array}$$

A) 27.4 days
B) 24.4 days
C) 23.4 days
D) 26.7 days