$3.$ GM Company's direct material costs for the month of January were as follows.

Actual quantity purchased

$18,000$ kilograms

Actual purchase price

$$3\mathrm{.}60$ per kilogram

Materials price variance $---$unfavourable $($based on purchases$)$

$$3,600$

Standard quantity allowed for actual production

$16,000$ kilograms

Actual quantity used

$15,000$ kilograms

Based on the above information, what is the direct materials quantity variance $?$