[Does it cost me anything to sell a product on the marketplace? Does it cost me to be a merchant?]

LL use wierd terminology on the fees page, so answer me this.

 

When i create a store and get the magic box and set up my sotre and become a merchant does it cost ME anything to sell my products?

 

If so is the 'commision' taken from my L$ or do they charge my bank to take real money for each item sold? Please help!