ellis sells two models model A and model b$.$ model A 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 ellis sells three times as many model t$\text{'}$s as models A$\text{'}$s$.$ The fixed cost are $$270,000$ how many units of model A are required to break even.