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

### Instruction:
John buys 20 bars of soap each weighing 1.5 pounds for $.5 per pound.  How much money did he spend on soap?

### Response:
 เขาซื้อสบู่ 20*1.5=<<20*1.5=30>>30 ปอนด์
นั่นมีราคา 30*.5=$<<30*.5=15>>15