Consider the following two-stage process. The process entrance flow is 63 units per hour. Only 61% of the flow proceeds to the second stage (the remainder is rejected from the system at the first stage).

The unit processing time at Stage 1 is 1 minutes while at Stage 2 the unit processing time is 1. WIP waits, on average, 5 minutes in the second buffer (B2) before proceeding to Stage 2. On average, there are 14 units of WIP in the first buffer (B1).

What is the average flowtime throughout the entire line, in minutes? Round your answer to the nearest first decimal place.