Answer:
Units to be sold = [tex]\frac{TotalFixedCosts}{Current contribution/unit-0.60}[/tex]
Explanation:
If the selling price is to remain unchanged, and all other costs do not change except the increase in variable labour costs by 60 cents per unit ($3.40-$2.80 = $0.6), then the contribution per unit is expected to go down by 60 cents.
New contribution = Current contribution - $0.60
Break even point in units = [tex]\frac{TotalFixedCosts}{New Contribution/unit}[/tex]
=[tex]\frac{TotalFixedCosts}{Current contribution/unit-0.60}[/tex]