i want to make a system like in building games when u double click an object in a special tab (call it buildables) it creates the object on the location your standing on. But i want to make it rpg-style.

ex: i want to create a wooden wall but i need for example 2 logs to create it then you lose 2 logs from you inventory and then it creates a wall on the location your standing on.
i want to make same for stone and stuff.
2 stone bricks = a stone wall

i hope someone can help me with it. I'll give credits and stuff