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

### Instruction:
Lisa bought a new iPhone for $1000. She bought a phone contract that costs $200/month, a case that costs 20% of the cost of the phone, and headphones that cost half as much as the case. How much will Lisa spend on her phone in the first year?

### Response:
 เคสมีราคา 1000 * 20% = 200
หูฟังมีราคา 200 / 2 = 100
สัญญาโทรศัพท์จะมีราคา 200/เดือน * 12 เดือน = 2400
ในปีแรก ลิซ่าจะใช้เงิน 1000 + 200 + 100 + 2400 = 3700 บาท สำหรับ iPhone ใหม่ของเธอ