Find the number of units (and revenue) you need to sell to cover your fixed costs.
Break-even units: Fixed costs ÷ (Price per unit − Variable cost per unit)
What if my variable cost is higher than my selling price?
Then no volume of sales can ever break even — you lose more money with every unit sold. The price needs to be raised above the variable cost, or the variable cost reduced, before break-even is achievable at all.