Quentin purchased $600$ shares of stock on margin for $$25\mathrm{.}38$ a share and sold the shares seven months later for $$30\mathrm{.}39$ a share. The initial margin requirement was $70\%$ and the maintenance margin was $30\%.$ The interest rate on the margin loan was $4\mathrm{.}5\%.$ He received no dividend income. What was his holding period return?

$(5$ points$)$

A$)9\mathrm{.}05\%$

B$)9\mathrm{.}45\%$

C$)11\mathrm{.}46\%$

D$)12\mathrm{.}67\%$

E$)27\mathrm{.}09\%$