Formulas adding up to a Kilo, or 1000, is about this threefold idea:
1. That the contents can be counted, when needing to calculate what amount is needed to produce 1 Kilo of perfume concentrate.
2. So that you can count the cost of materials that it will take, to produce 1 Kilo of Concentrate, and multiple thereof.
3. It provides a multiplication method to know how much material will be needed to produce more than 1 kilo of concentrate, for a large production run, if you calculate out how much concentrate you need to produce a certain number of bottles for that perfume at a known percentage of dilution.