P$2\mathrm{.}20$ Charlene Hickman expected the price of Bio International shares to drop in the near future in response to the expected failure of its new drug to pass FDA tests. As a result, she sold short $200$ shares of Bio International at $$27\mathrm{.}50.$ How much would Charlene earn or lose on this transaction if she repurchased the $200$ shares $4$ months later at each of the following prices per share?

a$.$ $$24\mathrm{.}75$

b$.$ $$25\mathrm{.}13$

c$.$ $$31\mathrm{.}25$

d$.$ $$27\mathrm{.}00$