||time(year, month, week, date), expense, discount,reward,price
||The food expenses of my family in a supermarket near my home. We often buy grocery stuff like bread and milk from the supermarket several times a week but we are not its member. The data are collected for finding whether it is necessary to be a member of that supermarket.
||Obtain a result that whether it is desirable to become a member. Evaluate how much the expenses can be discounted by becoming a member of that supermarket.
||Knowing how worth it is for becoming a member instead of just being a normal customer to check out for the same grocery products.