Corporation uses a standard costing system in which variable manufacturing overhead is assigned to production on the basis of the number of machine hours. The following data pertain to one month's operations

Variable manufacturing overhead cost incurred: $74,200 Total (flexible budget) variable overhead variance: $5,000 favorable Standard machine hours allowed for actual production: 3,600 Actual machine hours incurred: 3,818

What is the Corporation variable overhead efficiency variance? If favorable variance, type just the number; If unfavorable variance, type a negative sign, in front of the number (no space between); if no variance, type 0 (zero), as a number, not a word.