Mix$-$lt$-$Up Company sells two products called Shake and Stir and the company sales mix is $60\%$ and $40\%,$ respectively. The unit contribution for the Shake product is $$18,$ while the unit contribution for Stir is $$15.$ The company's fixed costs are $$184,800$ How many units of each product must Mix$-$It$-$Up sell in order to break$-$even?

a$)$ Shake break$-$even $=6,600$; Stir break$-$even $=4,400$

b$)$ Shake break$-$even $=10,266$; Stir break$-$even $=12,320.$

c$)$ Shake break$-$even $=4,400$; Stir break$-$even $=6,600$

d$)$ Shake break$-$even $=5,500$; Stir break$-$even $=5,500.$