Answer:
The variance is 4,000 - 4,200 = -200 (favourable variance).
Explanation:
To know the production variance in this exercise, we first need to know the total standard cost, then calculate the difference between the actual cost and the standard one.
Total standard cost = production volume x hour used per one unit produced x overhead cost per hour = 1,000 x 3 x 1.4 = 4,200
So, the variance is 4,000 - 4,200 = -200 (favourable variance).