I'm not sure where the Op is from, but that's not on par with a grocery trip in the Usa, for example, filling the trunk of the car and backseat with groceries, usually around at least 5 bags per trip. For example, at a safeway, costco or walmart. The Op will also likely be disappointed by the Foodmart if they are used to shopping at large western grocery stores.
Op will need to focus much more on getting food daily in Asia, rather then weekly grocery trips. It's part of living here for most people and takes much more time here for some reason, unless you have a car.