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

### Instruction:
James makes potatoes for a group.  Each person eats 1.5 pounds of potatoes.  He makes potatoes for 40 people.  A 20-pound bag of potatoes costs $5.  How much does it cost?

### Response:
40 people eat 40*1.5=<<40*1.5=60>>60 pounds of potatoes
60 pounds of potatoes costs 60/20*5=<<60/20*5=15>>15 dollars
#### 15

