Today people often buy food in bulk to save money. A hundred years ago people also wanted to purchase food wisely. Here’s some advice in a 1915 home economics textbook:
For a large family with room for storage it is cheapest to buy supplies in quantity. There is, however, even for the small family a real saving in careful buying. For example, if certain package goods are offered for fifteen cents per package or two for twenty-five cents, buy two if they can be used. The two and one-half cents saved on each package may seem a small saving, but in terms of percent it amounts to sixteen and two-thirds percent, or one-sixth of the whole.
A penny saved is a penny earned, and when it is done by careful buying it is far more easily earned than if some sacrifice is made to save it. In buying canned goods a reduction is often secured by taking a dozen cans or a case at a time.
Frequently a whole basket of fresh fruits and vegetables such as peaches and tomatoes can be purchased for little more than the price of a small quantity. If a whole basket is more than is needed for immediate use, one can preserve the surplus by cooking or canning it.
Science of Home Making: A Textbook in Home Economics (1915) by Emma E. Pirie