Bondi Corporation makes automotive engines. For the most recent month, budgeted production was 1,500 engines. The standard power cost is $3.10 per machine-hour. The company's standards indicate that each engine requires 9.3 machine-hours. Actual production was 1,800 engines. Actual machine-hours were 15,860 machine-hours. Actual power cost totaled $51,593.

Required: Determine the rate and efficiency variances for the variable overhead item power cost and indicate whether those variances are unfavorable or favorable.