How the calculation works
Delivered grain cost is bag price plus its shipping, divided by bag weight. Usable flour cost is delivered grain cost divided by yield as a decimal, plus the overhead you entered. Savings compare that figure with your purchased flour price.
When savings are positive, equipment break-even is additional equipment cost divided by monthly savings. Taxes, labor, electricity, waste and replacement parts are included only to the extent you enter them. Interest, resale value and recipe performance are not modeled.