Thomas LLC sells inexpensive toolkits. Thomas sells $2$ models, model A and model B$.$ Model A$\text{'}$s selling price is $$20$ and has a variable cost of $$14.$ Model B has a selling price of $$30$ and has a variable cost of $$20.$ Typically Thomas sells three times as many model Bs as model As$.$ Fixed costs are $$360,000.$ How many units are required to breakeven?

Select one:

a$.30,000$

b$.40,000$

c$.50,000$

d$.$ None of the above