The Armour Company had the following revenue and costs in the most recently completed fiscal year:

Total revenue $ $12,000,000$

Total fixed costs $ $3,000,000$

Total variable costs $ $6,000,000$

Total units produced and sold $1,000,000$

a$.$ What is the unit sales volume at the break$-$even point? $($Round your answer to the nearest whole number.$)$

Break$-$even point units