A serious question about buying call options. So i've been buying call options for years and have made great gains but I missed selling a June 19,2020 call option i bought of AMD at a $52 strike price. I was out of town and missed selling it on a dip. While Etrade executed it and now I have over 700 shares of AMD but now I have a fed call of $12,000 and a house call of $6100.The fed call has no due date but the maintenance call is due 06/22/2020 which I have no issue covering. its the fed call ive gotten confused about cause it say fed call issued Fed Call $0.00 -- -$12,729.00 So does that mean I can sell the AMD shares that were exercised and use that cash to go towards the fed margin call? Ive been trading for years but only a year or so in options so i'm still learning. Just need guidance if anyone can help me understand this situation.