The following table gives the operation times and due dates for five jobs which are to be processed on a machine. Assign the jobs according to the shortest operation time.

$\backslash$table$[[,$PROCESSING,$\backslash$table$[[$DUE DATE$],[($DAYS HFNCE$)]]],[\backslash$table$[[$J$0$B$],[101]],\backslash$table$[[$TIME$],[4$ days$]],\backslash$table$[[($DAYS HENCE$)],[5]]],[102,5$ days,$3],[103,2$ days,$4],[104,7$ days,$7],[105,3$ days,$2]]$

Calculate the mean flow time. $($Round your answer to $1$ decimal place.$)$

Mean flow time days