Arnold's Weathervane Company manufactures weathervanes. The current year operating budget is based on the production of 10,000 weathervanes with 1.25 machine-hour allowed per weathervane. Variable manufacturing overhead is anticipated to be $300,000.

Actual production was 11,000 weathervanes using 12,100 machine-hours. Actual variable costs were $23.75 per machine-hour.

Required: Calculate

1. The variable overhead

2. Rate variance

3. Efficiency variance