XM Satellite Radio Receiver $11.99 with free activation and three month service.

[mds]

Bestbuy卖$19.99
Best Buy Canada Web Store: Portable Electronics: Satellite Radio: Audiovox XpressEZ NHL XM Satellite Radio Receiver (XMCK5KCNHL)

Futureshop卖$99.99
Future Shop: Satellite Radio: XM: XM Satellite Radio Receiver (XMCK5KCNHL)

在futureshop做price match之后的价格是：
19.99-(99.99-19.99)=$11.99

free activation and three month service

​

 

[then]

19.99-(99.99-19.99)=$11.99??

 

[then]

不知道免费期之后每个月的收费是多少？

 

[mds]

19.99-(99.99-19.99)=$11.99??

应该是19.99-(99.99-19.99)x10%=$11.99