Heredium

Is it possible to increment the number of the same item in the inventory ? Let's say I am using an item "coin" and I would like to increment it by +1 from one zone to another. The inventory should look e.g. coin (2) after having answered a question at zone 2.

A beginners question: How do you deactivate zone 1 and then activate zone 2 ? Thx, Heredium