I'm looking to purchase the NT8 platform LEASE

Which is $2.13 ALL IN per contract FEE.

My question: When I make a trade, do I get charged $2.13 per contract only

OR do I get charged $2.13 per contract per trade?

EXAMPLE: I click buy, then I click sell do I get charged $2.13 + $2.13 = $4.26?