The Following Materials Standards Have Been Established for a Particular $\begin{array}{lccc}\text {Standard quantity per unit of output}&\text {1.7 metres}\\\text {Standard price}&\text {\$ 19.80 per metre}\\\end{array}$

The following materials standards have been established for a particular product: $\begin{array}{lccc}\text {Standard quantity per unit of output}&\text {1.7 metres}\\\text {Standard price}&\text {\$ 19.80 per metre}\\\end{array}$
The following data pertain to operations concerning the product for the last month: $\begin{array} { l r } \text { Actual materials purchased } & 5,800 \text { metres } \\\text { Actual cost of materials purchased } & \$ 113,680 \\\text { Actual materials used in production } & 5,100 \text { metres } \\\text { Actual output } & 3,200 \text { units }\end{array}$ What was the materials quantity variance for the month?

A) $6,664 favourable.
B) $6,732 favourable.
C) $13,720 unfavourable.
D) $13,860 unfavourable.