Sue is considering entering into either (a) a 6-month long forward contract with a forward price of $104 or (b) a European style 6-month call with a strike price of $100 and a premium of $10.35. If the effective rate of interest for a 6-month period is 4 %, at what spot price at expiration would Sue's profit be the same under both contracts?

I have the answer but if would be helpful to get the solutions, as well as the best way to do it/think about it. If that makes sense. Thanks!