Final answer:
The net profit per unit can be calculated by subtracting the spot rate of the Canadian dollar on the expiration date from the exercise price. In this case, the net profit per unit is $0.08.
Step-by-step explanation:
To calculate the net profit per unit, we need to consider the difference between the exercise price and the spot rate of the Canadian dollar on the expiration date.
Given that the premium received for selling the put option is $0.03 per unit, and the exercise price is $0.86, we can calculate the break-even point by subtracting the premium from the exercise price:
$0.86 - $0.03 = $0.83
If the spot rate of the Canadian dollar on the expiration date is less than $0.83, the put option will be exercised, resulting in a net profit of $0.86 - spot rate.
In this case, the spot rate is $0.78, so the net profit per unit is $0.86 - $0.78 = $0.08.