National Processing Company (NPC®), a leading
provider of merchant credit card processing and a wholly owned subsidiary of National Processing,
Inc. (NYSE: NAP), announced signing a multi-year agreement with Sonic Corp. for
end-to-end processing services. Under the terms of the agreement, NPC will provide credit and
debit card processing, including authorization and settlement, of all Visa® and MasterCard® sales.

Sonic Corp. (Nasdaq: SONC) is an Oklahoma City-based, publicly held company that owns,
operates and franchises the largest chain of drive-in restaurants in the United States. Sonic enjoys
the highest customer frequency rate in the quick-service restaurant industry. One of the unique
features of Sonic is the Carhop, a member of the Sonic crew who delivers food directly to
customers’ cars.

“NPC is delighted to be selected by Sonic Corp. to be their credit and debit card processing
solution,” said Drew Soinski, senior vice president of Travel and Entertainment for NPC. NPC has
recently signed several new clients in the quick service restaurant industry. “We have made a
strong commitment to provide a full-service solution that meets the high quality and service
standards that the quick service industry commands. NPC has quickly become a leader in offering
innovative merchant processing solutions for quick service restaurants.”

“Adding Sonic to our existing customer base of quick service restaurants links directly with our
strategy of focusing on new channels of growth,” said Thomas A. Wimsett, president and chief
executive officer of NPC. “NPC has made substantial investments in developing full-service
processing solutions for the quick service industry thus providing new growth opportunities for our
organization. Sonic is just the brand of customer we are targeting—a leader in their field with
national presence and recognition, and a strong emphasis on quality and service.”

“It is exciting to partner with such an industry-leader as NPC,” said Keith Jossell, vice president of
Finance and Treasurer of Sonic Corp. Sonic consistently has among the highest convenience
ratings in the industry. “Offering fast and efficient payment alternatives is another example of how
we strive to put our customers first.”

News, Sonic