Assume that an investor purchased a put option on BP with an exercise price of $1.900 for $0.0215 per unit. There are 31,250 units in a GBP options contract. At the time of the option expiration date, the spot price for GBP was $1.885. What was the net profit/loss on this option to the investor?
a. $203.125
b. $671.8750
c. $468.75
d. $1,140.625