Jill works as a waitress at the local diner where she earns an hourly wage of $8.00 per hour and a standard tip rate of 30% of the cost of the orders she serves. If she worked four 12-hour shifts this week and averaged $40 in orders per hour, how much did Jill earn this week? Choose the correct choice from the following choices:
A) 1120
B) 300
C) 320
D) 350
E) 400
Jill earns 8 dollars/hour and the hourly tip is (3/10)*40.   Jill thus earns 8*14+14*12 per day(or 8(14)+12(14)=20(14)=280).   Jill has worked for 4 days -&gt; 280*4=1120.   This matches answer choice 1120.
<result>A</result>
Jill works as a waitress at the local diner where she earns an hourly wage of $8.00 per hour and a standard tip rate of 30% of the cost of the orders she serves. If she worked four 12-hour shifts this week and averaged $40 in orders per hour, how much did Jill earn this week?