Based on the data provided in Table $2\mathrm{.}5,$ what is the flow time of callers from $8$:$00$ am to $8$:$44$ am$?$

Note: Round your answer to $1$ decimal place.

Caller Time in Time out

$18$:$008$:$18$

$28$:$028$:$13$

$38$:$028$:$08$

$48$:$068$:$21$

$58$:$068$:$13$

$68$:$118$:$22$

$78$:$168$:$34$

$88$:$268$:$44$

Need to Answer: Flow Rate: $\_\_\_\_\_$ per min