I use variations in order to let the user choosing if he is equipped or not and his team.
For example I have the following variations :
- Equipped, green team : 10$
- Equipped, red team : 10$
- Non-Equipped, green team : 49$
- Non-Equipped, red team : 49$
But now I want to propose many (optionnals) options like : grenades, ammo etc.
I think the addon suggested by bheadrick can do the work.