XYZ Co$.$ has the following sales mix for its three products: A$,20\%$; B$,35\%$; and C$,45\%.$ Fixed costs total $$400,000$ and the weightedaverage contribution margin is $$100.$ How many units of product $C$ must be sold to break$-$even?

a$.1,800.$

b$.14,00.$

c$.$ None of the answers is correct.

d$.4,000$

e$.800.$