Jill works as a waitress at the local diner where she earns an hourly wage of $7.00 per hour and a standard tip rate of 5% 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 option:
A) 280  B) 300  C) 320  D) 432  E) 400
Jill earns 7 dollars/hour and the hourly tip is (1/20)*40.   Jill thus earns 7*12+12*2 per day(or 7(12)+2(12)=9(12)=108).   Jill has worked for 4 days -&gt; 108*4=432.   This matches answer choice 432.
<result>D</result>
Jill works as a waitress at the local diner where she earns an hourly wage of $7.00 per hour and a standard tip rate of 5% 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?