In a regular week, there are 5 working days and for each day, the working hours are 8. A man gets $2.40 per hour for regular work and $3.20 per hours for overtime. If he earns $432 in 4 weeks, then how many hours does he work for ?  Choose the correct choice.
A) 135
B) 278
C) 175
D) 195
E) 200
C   175   Suppose the man works overtime for x hours.   Now, working hours in 4 weeks = (5 x 8 x 4) = 160.   160 x 2.40 + x x 3.20 = 432   3.20x = 432 - 384= 
<gadget id="calculator">432 - 384</gadget>
<output>48</output>
48   x= 15.   Hence, total hours of work = (160 + 15)= 
<gadget id="calculator">(160 + 15)</gadget>
<output>175</output>
175.
<result>C</result>
In a regular week, there are 5 working days and for each day, the working hours are 8. A man gets $2.40 per hour for regular work and $3.20 per hours for overtime. If he earns $432 in 4 weeks, then how many hours does he work for ?