This culinary manager is asking the right question, and they shouldn't have to wrestle with Excel to get the answer. The problem isn't that they lack skill with spreadsheet formulas; it's that the tool itself makes a simple proportional calculation feel like advanced calculus.
Let's look at what's actually happening. One batch of gravy yields 12 bags. Each bag contains 0.5 gallons. So a full batch is 6 gallons of finished product, built from 4 gallons of milk, 4 packets of gravy mix, 3 gallons of water, and 1 cup of bacon grease. The question is straightforward: if you've used, say, 8 bags, how much of each raw ingredient does that represent? The answer is simply a fraction of the batch, 8/12 of each component. That's 2.67 gallons of milk, 2.67 packets of mix, 2 gallons of water, and 0.67 cups of grease. The math is consistent, repeatable, and absolutely should be automated.
What this manager really needs is a system that treats each recipe as a single unit of logic. Instead of manually building formulas that divide and multiply across cells, they need a spreadsheet that understands relationships: one batch equals 12 bags, and each ingredient scales linearly. Once that relationship is defined, counting "x" bags should instantly update every ingredient column. That's not a spreadsheet fantasy, it's a basic data structure problem that modern tools handle without requiring the user to think in cell references.
The frustration here is common, and it points to a larger opportunity. Inventory management in a kitchen is fundamentally about ratios and yields. If a recipe produces 12 bags, and you count 7 partial bags and 3 full ones, the tool should let you enter the count and immediately see the raw material draw. No lookup tables. No nested IF statements. Just a clean input and a clear output.
This manager already knows what they want, they just need a spreadsheet that meets them halfway. The answer isn't to learn more Excel tricks; it's to find a tool that treats recipes as the core logic they are. Start by entering your batch as a single row with the total yield and ingredient list. Then let the software handle the fractions. That's the direction that turns inventory from a headache into a dashboard.