how do i find how many workers worked in a month? is there a formula?

1. Direct Labor Efficiency Variance Direct Labor Efficiency Variance = (Standard hours - Actual hours) Standard rate Standard hours = 6,000 units x 1 hour per unit = 6,000 hours Actual hours = 5,800 hours Standard rate = $12 per hour Direct Labor Efficiency Variance = (6,000 - 5,800)