Start with the formula.
Every product begins as a formulation: a versioned recipe of materials, with percentages, yields and costs all anchored to the source. Edit a percentage and the cost, the yield and the downstream compliance state all move with it.
Versions are never lost. Each release is a snapshot the rest of the system can point back to, so production, batches and labels always know which formula they came from.
Formulation is the single source of truth. Nothing downstream stores costs or compliance state independently.