Pocket $ goes to stationary shop

The first week Aamax bring his daily pocket money to school.

1st day he brought a RM1 eraser from stationary shop.
2nd day he brought a RM1 sharpener from stationary shop.
Mama :"why you have to buy exactly RM1?"
Max :"because its easier as i only have RM1, i don't have to worry if i have not enough money."
3rd day he brought a 80cen small notebook.
Mama :" what you buy is not necessary as home have all the stationary you can find in your bookshop, you can save more of your money to buy something more interesting like toys."
4th, 5th, 6th day..Aamax didn't buy anything.
7th day Aamax said :"i now have RM3, i can bring it to my stationary shop to buy more things."
Mama :-_____________-"