what is APPLE.COM/BILLCUPERTINOCA

This is primarily a user-to-user support forum; other Apple users like you. We don't have access to information about charges to your account. Apple has a support article about charges — see each of the steps in the following instructions. They include information on contacting Apple Support if the other steps don't help. See: If you don't recognize a charge - Apple Support

Follow the steps in the support document linked below to identify the charge.

click here ➡️ If you don't recognize a charge (apple.com/bill) - Apple Support