Nifty Bank Option strategy E,O,D [Expiry week Jun 16]

Nifty Bank closed @ 17650+

Now I'm holding short position:
18000 CE @ 12.65
17200 PE @ 15.30 [previous position continued]
Total = 27.95 points

Exited 18300 CE short today @ 1.80 [Buy]
Sold @ 17.90
Profit: 17.90 - 1.80 = 16.1 points