sony card question

hey i was looking at getting a sony card so i need a few questions answered here

1. for every dollar how many points do i get?

2. it says i can use it for groceries. can i use that at any grocery store.

info to know my mom spends 200 and some dllors on groceries a week so how many points will i get?

http://www.sonyrewards.com/en/home/sonycard/

i'm sure you can probably find some answers there