The curent price of a stock is $$105,$ and three$-$month European call options with a strike price $$107$ currently sell for $$5\mathrm{.}20.$ An investor who feels that the price of the stock will increase is trying to decide between buying $100$ shares and buying $1500$ call options. Both strategies involve an investment of $$10500.$ If the share price increases to $$120,$ the gain to the investor if he bought call options will be $$---.$ If the share price increases to $$120,$ the gain to the investor if he bought shares will be $$----.$ It is therefore advisable for the investor to but $----$ to benefit from an increase in share price. For both the strategies to be equally profitable the stock price should increase to $$----.$