What is undefined?

Imagine you're pricing your signature 8-inch chocolate fudge cake. You’ve listed the flour, sugar, cocoa powder, eggs, and butter. But what about the tiny splash of vanilla extract, the sprinkles you add to the side, or the electricity used by the mixer for 10 minutes? These are often considered 'undefined' costs because they’re not immediately obvious or easy to assign to a single batch. If you don't account for that $0.15 worth of vanilla or the $0.05 of electricity, you're not seeing the full picture of your ingredient cost. Let's say your 8-inch chocolate fudge cake recipe calls for 500g of butter at $6.00/kg, 600g of sugar at $1.50/kg, 200g of cocoa powder at $12.00/kg, 4 large eggs at $0.30 each, and 100g of butter at $7.00/kg for the buttercream. So far, your ingredient cost is $3.00 (butter) + $0.90 (sugar) + $2.40 (cocoa) + $1.20 (eggs) + $0.70 (buttercream butter) = $8.20. This doesn't include the 10g of vanilla extract at $20.00/L, which is another $0.20, bringing your ingredient cost to $8.40 for the cake. Still undefined are things like the cost of the cake board, the box, and even the small amount of water used for cleaning your piping bag. When you decide to sell this cake for $30.00, and your only calculated cost is $8.40 for ingredients, you might think your profit is $21.60. However, if the total cost of ingredients, packaging, and a portion of your utilities and labor for that specific cake actually comes to $12.00, your real profit is only $18.00. The difference of $3.60 is the 'undefined' cost you missed. This is crucial when calculating your bakery cost of goods sold; if you consistently miss these small amounts, they add up quickly, especially across hundreds of cakes sold per month. For an artisan sourdough loaf weighing 1kg, your flour might cost $1.00, water is negligible, and your starter is a recurring cost. But what about the salt at $0.10, the electricity for the oven at $0.50 per loaf, and the depreciation of your mixer over its lifespan? If you're only calculating the flour cost and selling the loaf for $7.00, you might think your profit is $6.00. But if the true cost, including all those 'undefined' elements, is $3.50, your actual profit is only $3.50. Understanding and defining all costs is key to accurately calculating your COGS for bakers.