Objective notes8 learning objectives7.2.1Labour productivity• Labour productivity = Output per period (units) / Number of employees = units per employee.View7.2.2Total variable cost• Total variable cost = Variable cost per unit × number of units.View7.2.3Variable cost per unit• Variable cost per unit = Total variable cost / Number of units.View7.2.4Total cost• Total cost = Total fixed costs + total variable costs.View7.2.5Average cost• Average cost = Total cost / Number of units.View7.2.6Break-even output• Break-even output = Fixed costs / Contribution per unit.View7.2.7Contribution per unit• Contribution per unit = Selling price per unit - variable cost per unit.View7.2.8Margin of safety• Margin of safety = Actual number of sales - break-even number of sales.View