You can enable payment methods separately for your Box Office and Online Store. To do this, follow these steps:
1) In your Box Office, in the drop-down menu under your account name, click "Settings"
2) Click on the "Payment Methods" tab on the left. Now, click on "Choose Payment Method" and select the Payment method you want to be available on your Online Store and Box-Office. You can select either "Accept Credit Cards", "PayPal", or both. If you select both, your customers will be given an option to pay via credit card or PayPal.
3) You can then select whether or not you want payment methods to be combined in the Box Office (How do I find this?). If enabled, this will allow you to accept up to two different forms of payment for a single transaction. (Example: A customer may want to pay partly in cash and the balance by check.) The only exception is that "Complimentary" payment method cannot be combined because by definition a Complimentary ticket is already free.