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

### Instruction:
Dan owns an ice cream shop and every sixth customer gets a free ice cream cone. Cones cost $2 each. If he sold $100 worth of cones, how many free ones did he give away?

### Response:
 เขาขายไอศกรีมไป 50 ใบเพราะ 100 / 2 = <<100/2=50>>50
เขาให้ไอศกรีมฟรี 10 ใบเพราะ 50 / 5 = 10