Manage product options and variants - enterprise shop

Options and Options values are widely used in OLALA CMS based website: e-Commerce (simple and Enterprise shops), Tourism, Events etc.
In shops for products options can colours and sizes.

Options are very relevant when it is about making difference between simple & enterprise shop version

Enterprise shop is just a term used in OLALA CMS. Enterprise shop is where the owner sell items he buy from a supplier and when items are sold it is possible items can run out of stock
As well he keeps track of all transactions using an account system, he has a warehouse he use an account system; any items must have a code.
He sell apparel. Options can be colours and sizes
For the option COLOURS values can be: red, blue & black
For the option SIZES values can be: S, M, L, XL & XXL
A shirt RED / L is named variant and it has attached the code SHRL001 (an example)
The owner will always how many red / L shirts has on stock and will be notified when stock run low / people may be not allowed to buy of there is no stock available.