The story of the birth of accounting begins with numbers. In the 1400s, much of Europe was still using Roman numerals, and finding it really hard to easily add or subtract. (Try adding MCVI to XCIV.)
But fortunately, Arabic numerals (1, 2, 3, 4, etc.) started catching on, and with those numbers, merchants in Venice developed a revolutionary system we now call "double-entry" bookkeeping. This is how it works:
How much extra would you pay for local food? It's a familiar question. We face it practically every time we shop for groceries, either at the store or at the farmers market. But what about food that can save the lives of severely malnourished children?