Colossal Beverages Company sells two products, A and B$.$ Mist predicts that it will sell $3,000$ units of A and $1,500$ units of $B$ during the next period. The unit contribution margins are $$4\mathrm{.}00$ and $$4\mathrm{.}80$ for products A and $B,$ respectively. What is the weighted $-$ average unit contribution margin? $($Round your answer to the nearest cent.$)$

A$.$ $$4\mathrm{.}40$

B$.$ $$4\mathrm{.}53$

C$.$ $$4\mathrm{.}27$

D$.$ $$8\mathrm{.}80$