Article with variants

[eronweb]

Hello Community,

I have two questions:

1. I have a product with two different variants. One  with 100ml and 200ml.
   I want two different item numbers for them.
   Actually I gave them two item numbers but it shows me only one item number.
   example: 100ml has the item number 43214 and 200ml 98760, but it shows me only the item number 43214 for both variants.
2. I want a price under each option that I can choose. How I can realize that and where? I want to see what each option costs.
   example.: Option 100ml costs 2€ and option 200ml costs 4€

Best regards