well, the 5$ are for useing the service so they allways add to the total
if u were to unslot cards fro an item, youd pay 2$ for each, and youd get to keep them, but not the item itself unless you pay another 2$
so to uncard say ..a 3 carded sqi you'd have to pay 11$ and you'd lose the sqi but keep the cards, 13$ and youd get the cards and the sqi fully separated
there is no way to unslot and keep the item but not the cards
for ur question, 7$ to unslot a card, keep the card and lose the item and all the cards that were left in it after the unsloting process ~nyo^^