资料题：How can customers receive the special introductory price?

Noah’s Full Service Carwash in GeyservilleWelcomes you to the neighborhood!For over 20 years, Noah’s has established itself as the leading chain of full-service car wash facilities in Pasadena County. We use state-of-the-art equipment, nonabrasive cleaners, and environmentally conscious methods.We do hope you will try us for your vehicle maintenance needs! To welcome you to the area, we are attaching a coupon for a markdown on any one of the following car wash packages, which you will need to present to take advantage of the services on offer：BASICRegular Price： $29.99Special Introductory Price： $19.99Foam wash, Hand dry, Windshield Cleaning, Tire rim polishPREMIUMRegular Price： $39.99Special Introductory Price： $29.99Same as basic plus： Interior vacuum, Blow dry, Air freshener ULTIMATERegular price: $49.99Special Introductory Price： $34.99Same as premium plus： Rainbow wash, Interior shampoo, Exterior waxWe take all forms of payment with the exception of personal checks.