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Calculate the following: a. The fixed ovecheod rate for 2020 b. The fred ovorhead sponding varience for 2020 6. The production wolume variance for 2020 a. Calculate the fixed overhend rate for 2020 . Fined ovethead rate per kour for 20 an b. Caiculate the frod overtead spending varance for 2020 . (Complete at input fielda.) c. Caiculale the producton-volume vanance for 2020 . (Complete at input fieids)