Davison Co$.$ prepared the following contribution format income statement based on a sales volume of $10,000$ units $($the relevant range of production is $5,000$ units to $15,000$ units$)$:

Sales $ $300,000$

Variable expenses $180,000$

Contribution margin $120,000$

Fixed expenses $90,000$

Net operating income $ $30,000$

Required:

How many units must be sold to achieve a target profit of $$80,000?($Do not round intermediate calculations.$)$