The Albright Company Uses Standard Costing and Has Established the Following

The Albright Company uses standard costing and has established the following standards $f$ its single product:
$\begin{array}{|l|r|}\hline \text { Direct Materials } & 2 \text { litres at \$3 per litre } \\\hline \text { Direct Labour } & 0.5 \text { hours at \$8 per hour } \\\hline \text { Variable Manufacturing Overhead } & 0.5 \text { hours at \$2 per hour } \\\hline\end{array}$
During November, the company made 4,000 units and incurred the following costs:
$\begin{array}{|l|r|}\hline \text { Direct Materials Purchased } & 8,100 \text { litres at } \$ 3.10 \text { per litre } \\\hline \text { Direct Materials Used } & 7,600 \text { litres } \\\hline \text { Direct Labour Used } & 2,200 \text { hours at } \$ 8.25 \text { per hour } \\\hline \text { Actual Variable Manufacturing Overhead } & \$ 4,175 \\\hline\end{array}$
The company applies variable manufacturing overhead to products on the basis of direct labour hours.
-What was the labour efficiency variance for November?

A) $550 unfavourable.
B) $1,050 unfavourable.
C) $1,600 favourable.
D) $1,600 unfavourable.