and one i recently found, copaton allows you to buy an item, reminds you you're in the store where you buy that item. >> part of it i admit is just staying organized, which is not easy to do in this day and age. >> the thing that's important for people to understand, when you look at how to save money, it's not always going where the sale items are. you would want to use coupons and sale items. you want to compare the unit price for every item. you know what you're paying for the amount you're buying. >> buying in bulk is not the best bet? >> no. ten cans might be bigger than that big vat but when you look at the unit price, it's credit back. >> 6% cash back on groceries on some cards, if you really want that cash back and you do a lot consider. can you get cash back for your gasoline and you're filling up but the thing i really like are those fuel rewards car where you get cashback -- sorry, you build up points based on how much gas you use. store or vice versa. those two rewards cards can be very helpful. >> sure. >> up next, a look at the news in the week ahead. and bottoms >>> for