Answer: C
Step-by-step explanation: This is the most common answer choice [majority of the time] because of the face that they carry so much weight, and because whenever you are in doubt, you have nothing to do but guess.
1.25 x 250=$312.50 as Alex’s new salary.
1.25 x 180=$225 as Ben’s new salary.
Now subtract Ben’s salary from Alex’s salary
312.50 - 225=$87.50
Alex earned $87.50 more in one month than Ben