Barney Stinson, a "legal advisor" at Goliath Bank, is under intense pressure at work to ensure that his division generates at least $$250,000$ operating income this year. The financial instrument that his division sells produces contribution margin of $$5$ per unit and a contribution margin percentage of $80\%.$ Barney's division has $$40,000$ of fixed costs. What level of sales revenue does Barney need to achieve in order to meet the division's goal of $$250,000$ of operating income this year?