Jackson is a speculator who sells a call option on Malaysian Ringgit for a premium of $$0\mathrm{.}038$ per unit of Malaysian Ringgit, with an exercise price of $$0\mathrm{.}21$ per Malaysian Ringgit. The option will not be exercised until the expiration date, if at all. If the spot rate of Malaysian Ringgit is $$0\mathrm{.}25$ per Malaysian Ringgit on the expiration date, Jackson's net profit per unit is: