Beta Company produces mirrors. During the year, 250,000 mirrors were produced. Materials and labor standards for producing the mirrors are as follows:

Direct materials (2 pieces of glass @ $2)	$4.00
Direct labor (2 hours @ $16.00)	$32.00

Beta purchased and used 600,000 pieces of glass at $2.50 each, and its actual labor hours were 400,000 hours at a wage rate of $18.00.

What is the materials price variance?