You engage in the following strategy:

Buy a call, strike price $=$ $$5,$ option premium $=$ $$2$

Buy a call strike $=$ $$15,$ option premium $=$ $$4$

Sell two call options with a strike price $=$ $$10$; option premium $=$ $$2\mathrm{.}50$ each

All options are written on $100$ shares.

Within $$10,$ what is the most that you can make?