teller at a drive$-$up window at a bank had the following service times $($in minutes$)$ for $20$ randomly selected customers:

Bank drive thru data$-1.$jpg

The sample standard deviation was calculated as $0\mathrm{.}19,$ and the standard deviation of ranges was calculated as $0\mathrm{.}096.$

What is the upper control limit $($UCL$)$ of the mean chart when z$=3?($Please round your answer to two decimal places$)$