please help me with the price goes down to $90 part where did they get the +5 from for the total?

Example B Writing (selling) a call option on Apple Assume Apple share price = $100 Write/Sell American call option Option price = $5 -Strike price = $120 - Expiration = 2 months from now Case A: price goes to $150 Purchaser exercises option - Buy at $150, sell at $120 - Total = -150+120+5 = -25 Case B: price goes to $90 Purchaser doesn't exercise option - Total = +5 100 - 890 + $5 (ts or Laitz Share lown 2