I have 14 different boards one each ready to ship. So means 7 different voltages with EACH 2ppm and 5ppm respectively, means 14 totally. If someone order 1.25V with 2ppm, then 1.25V with 5ppm is left in stock. So I have put the stock level to 2 for the 1.25V choice and 7 to 2ppm and also 7 to 5ppm.
I think, I can make only one option with 14 different choices available, this will work.
All combinations of the options are possible. If you have 2 options with 10 choices, then the user can choose from 100 different combinations. (10 x 10=100).
I have some spare boards available until the new order will arrive, I will see how the stock level behaves when someone order it. It is my first item with options.