In retail it is called Generic vs. Branded packaging.
The way this works is that Nakumatt gets the supplier e.g Harpic toilet cleaner to package a certain percentage of their "supplies" as Nakumatt toilet cleaner as a condition for them getting "shelf space" in the shop. They also demand that the goods be supplied at "cost price" meaning that the supplier only makes a profit on the volumes sold on the branded side of the shelf while the supermarket enjoys the benefits of telling the customers that they are cheaper than their competitor and are therefore able to attract a wider customer base into their shop.
So don`t think for one minute that Nakumatt has a soap making factory or a crisps making factory; all they have done is basically hold their suppliers at Ransom to supply some of their stock under their name in exchange for getting "space" in their shops to sell their own branded merchandise.
It sounds ridiculous but big international supermarkets have been doing it for years,