I have a 35K account with IB. I wanted to buy 400 shares of SPY. I wrote 4 November 87 calls at 3pts expiring next Friday. My net liquidation value is around 36K. My RegT margin is around 7000. My current available funds are around 29000. My Buying power is around 90K. What would these numbers be if Monday opens at 80 and all of these are exercised?