Rates are valid for Sam's Club members only. $19 rate applies to processing up to $800 in monthly volume in MasterCard, Visa and Discover transactions. American Express transactions priced separately. Higher flat rate pricing available for businesses processing at a higher volume. Rates and eligibility are subject to change without notice. All merchants are required to complete a merchant application and are subject to underwriting and approval. Additional fees may apply. All rates and fees are subject to change in accordance with the terms of the Merchant Agreement. Processing services provided solely by First Data. more... See more text