Standard costing refers to expected costs under anticipated conditions and allows for comparison of standard versus actual costs. Differences between standard and actual costs are referred to as variances, which should be investigated if significant. Standard cost is the cost of a single unit while budgeted cost is the total cost of budgeted units. Target costing determines the allowable cost to earn a required profit, while kaizen costing continually reduces costs after design and production. Cost variances measure differences between planned and actual costs. Material, labor, and variable overhead variances compare standard and actual costs for these items.