A process requires 6 tasks, A, B, C, D, E and F, that must be performed in that order. Currently, there are 3 employees that are equally skilled at each task. Employee 1 is assigned tasks A and B, employee 2 is assigned tasks C and D and employee 3 is assigned tasks E and F. The task times (all in seconds) are given in the process table below. For example, task A requires 90 seconds.

Suppose the system started without any work in process inventory (i.e., an empty system). How long would this process take to produce 8 units (in seconds)?

A B C D E F

90 52 60 31 50 10