Provide the following information:

1. Materials variance for March
2. Materials efficiency for March
3. Labor rate variance for March
4. Labor efficiency variance for March

Kirby Engineering performs cement core tests in its laboratory. The following standards have been set for each core test performed: During March, the laboratory performed 2,000 core tests. On March 1 no direct materials (sand) were on hand. The following events occurred during March: - 8,600 pounds of sand were purchased at a cost of $7,310. - 7,200 pounds of sand were used for the core tests that were performed. - 840 actual direct labor hours were worked at a cost of $8,610