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

### Instruction:
Mo is buying valentine's day cards for the class. There are 30 students and he wants to give a Valentine to 60% of them. They cost $2 each. If he has $40, what percentage of his money will he spend on Valentine?

### Response:
30*60% = <<30*60*.01=18>>18 students
18*2 = $<<18*2=36>>36
36/40 = 90% of his income
#### 90