You form a collar by buying a put with an exercise price of X1 = $23 and a premium of P = $6, and selling a call with an exercise price of X2 = $85 and a premium of C = $6. Both options mature in 7 months, and both have the same underlying asset. In addition, you buy the underlying asset for its current spot price of S = $64. Find the profit of this collar at expiration if the ending price of the underlying asset is ST = $7