Jill works as a waitress at the local diner where she earns an hourly wage of $5.00 per hour and a standard tip rate of 25% of the cost of the orders she serves. If she worked four 9-hour shifts this week and averaged $40 in orders per hour, how much did Jill earn this week? Choose the most appropriate option:
A) 280	B) 300	C) 540	D) 350	E) 400
Jill earns 5 dollars/hour and the hourly tip is (1/4)*40.   Jill thus earns 5*9+9*10 per day(or 5(9)+10(9)=15(9)=135).   Jill has worked for 4 days -&gt; 135*4=540.   This matches answer choice 540.
<result>C</result>
Jill works as a waitress at the local diner where she earns an hourly wage of $5.00 per hour and a standard tip rate of 25% of the cost of the orders she serves. If she worked four 9-hour shifts this week and averaged $40 in orders per hour, how much did Jill earn this week?