单项选择题

案例分析题

Receipt
November 9，20-
Tony Parker
http：//www.kramerstores.com
Kramer Retail Stores
Amerton Mall
41West Amerton Parkway
Ross Park，KS
www.kramerstores.com/amertonmall
Book Retail Receipt
Item：Future Oriented Investment Strategies
RF#：2011CL0956
Total：$21.98
Payment Type：Credit Card
Authorization Code：XXXXXXXXXXX028
Confirmation Number：21PLTR4
All returns must be made within 14days.Receipt is required for refund.Without receipt，only store credit can be given.

How much did Tony Parker pay for his purchase?（）