Joe's coffee has one barista that serves customers between $6-8$ am$.$ Demand is fairly constant during this period at $30$ customers per hour with a $c_a$ of $1.$ Each drink takes $1$ minute to prepare on average with a $c_p$ of $0\mathrm{.}8.$ What is the barista's utilization? $($be sure to enter utilization as a fraction $--$ i$.$e $80\%$ should be entered as $0\mathrm{.}80)$