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

### Instruction:
Mary does her grocery shopping on Saturday. She does her shopping only at a specific store where she is allowed a credit of $100, which must be paid in full before her next shopping trip. That week she spent the full credit limit and paid $15 of it on Tuesday and $23 of it on Thursday. How much credit will Mary need to pay before her next shopping trip?

### Response:
 จนถึงตอนนี้ เมอรี่ได้ชำระเงินคืนทั้งหมด 15 + 23 = <<15+23=38>>38 เหรียญของเครดิต
ดังนั้น เธอยังต้องชำระเงิน 100 - 38 = <<100-38=62>>62 เหรียญ