An investor is bullish in XYZ stock. He decides to buy on margin $1,000$ shares at market price of $$50\mathrm{.}00.$ The initial margin is $60\%,$ and the maintenance margin is $30\%.$ Margin loan has $5\%$ interest rate per year. What is last stock price that will avoid a margin call? Ans.: $$\_\_\_\_\_\_\_\_.$

A$)26\mathrm{.}14$

B$)28\mathrm{.}58$

C$)28\mathrm{.}57$

D$)26\mathrm{.}13$