Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
Jessa needs to make cupcakes for 3 fourth-grade classes that each have 30 students and a P.E. class with 50 students. How many cupcakes does she need to make?

### Response:
For the fourth-grade classes, Jessa needs 3 classes * 30 cupcakes/class = <<3*30=90>>90 cupcakes
Adding the cupcakes for the P.E. class 50 + 90 = <<50+90=140>>140 cupcakes
#### 140