You decided to get stuff for the cake first before decorating it, and you needed to start with the stuff to make the mix, so you head to the grains aisle which would contain the stuff you needed to mix all the ingredients together. Luckily enough the grains aisle had what you needed to get the stuff.
Grains were the kind of food you would locate in the pantry of your kitchen cabinet that was in bread, saltines, and sometimes even in cereal that had wheat in them every time you eat them for breakfast, while also waking up in mornings. However, you needed to get flour, and sugar for the cake, and luckily the store had the biggest bags you could find at a very low price. Once you, and your girlfriend got the bags into the cart, you moved onto the next aisle in the store.