The standard cost card for one unit of a certain finished product shows the following:

Standard Quantity or Hours Standard Price or Rate

Direct materials 10 pounds ? per pound

Direct labor 3.0 hours $16 per hour

Variable manufacturing overhead

4.0 hours $10 per hour

The total standard variable cost for one unit of finished product is $90 and the company produces 600 units of finished product in June. Additional information regarding direct materials in June include the following:

Actual quantity purchased	5,400	pounds
Actual quantity used in production	5,000	pounds

What is the materials quantity variance for the month?