So, I'm just going to go ahead and answer this question (Even though the question isn't quite defined):
Assuming that we want to know his usual pay, we can represent his pay with the variable 'p':
32p + 4(1.3p) = 531.96
32p + 5.2p = 531.96
37.2p = 531.96
p = 14.3
Knowing this, we can multiply his usual pay by 1.3 to find his overtime pay:
14.3 * 1.3 = 18.59
Julio's normal pay is $14.30 an hour, and his pay after 32 hours of workingis $18.59.
If this wasn't the answer you were looking for, tell me and I'll fix it.
Have a nice one!