Colortrigon Company produces picture frames. During the year, 200,000 picture frames were produced. Materials and labor standards for producing the picture frames are as follows:

Direct Materials (2 pieces of wood @ $2) $4.00

Direct Labor (2 hours @ $10) $20.00

Colortrigon purchased and used 300,000 pieces of wood at $2.00 each, and its actual labor hours were 350,000 hours at a wage rate of $11.

What is the materials usage variance?