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

### Instruction:
Jim has a pail with rocks in it. The average weight of a rock is 1.5 pounds. A local rock collector agrees to pay him $4 for every pound of rocks. If he makes $60 off the sale, how many rocks were in the bucket?

### Response:
 มีหินอยู่ในถัง 15 ปอนด์ เพราะว่า 60 / 4 = <<60/4=15>>15
มีหินอยู่ในถัง 10 ลูก เพราะว่า 15 / 1.5 = <<10=10>>10