So here is our setup with CEs –
Debit Paid = 139.35 + 21 – 66.5 -66.5 = 27.35
Upper Breakeven:
Higher Long Option Strike – Debit Paid = 9950 – 27.35 = 9922.65
Lower Breakeven:
Lower Long Option Strike + Debit Paid = 9750 + 27.35 = 9777.35
Max Profit
= The distance between the short strike and long strike – Debit Paid
= 9850 – 9750- 27.35
= 72.65