Mascara produces face masks. The unit selling price is $5. The company's costs for 2020, when it produced and sold 1,000 masks, were as follows: Assuming that unit selling price, unit variable costs, and total fixed costs remain the same in 2021, how many masks must the company sell to break even?

Variable cost and materials - $2 per unit

Fixed factory overhead - $5 per unit

Variable seeling and admin - $1 per unit

Fixed selling and adm exp - $5 per unit