Presented is information for Stafford Company's three products. A B C Unit selling price $6 $8 $8 Unit variable costs (4) (5) (3) Unit contribution margin $2 $3 $5 With monthly fixed costs of $143,000, the company sells two units of A for each unit of B and three units of B for each unit of C. Determine the unit sales of product A at the monthly break-even point.