I'm stuck on this math problem: At Theo’s cafe, he makes 3 egg and 4 egg omelettes.  His cafe is open from 7:00 a.m. to 11:00 a.m.  In the first hour, 5 customers order the 3 egg omelettes.  In the second hour, 7 customers order the 4 egg omelettes.  In the third hour, 3 customers order the 3 egg omelettes. In the last hour, 8 customers order the 4 egg omelettes.  How many eggs does Theo need to make all the omelettes?
Can you help?