**Useful to fix calorie calculation for some products
**Useful to fix calorie calculation for some products
* Calculate packaging weight by making the difference between actual weight and advertised weight
* Calculate packaging weight by making the difference between actual weight and advertised weight
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* Calculate weight per volume for products (1dL of water is 1kg, but this changes for various products that also have a mention of their volume)
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* Calculate weight per volume for products (1dL of water is 1kg, but this changes for various products that also have a mention of their volume, e.g. milk)
* Some products will have multilingual weights
* Some products will have multilingual weights
** we can check that the conversion is well done if we have both values
** we can check that the conversion is well done if we have both values