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Carvelle Cabinets set the following standard cost per unit for 2018. Fixed overhead (4 machine hours at $10) $ 40 Variable overhead (4 machine hours at $8) $ 32 The standards were set based on a capacity of 20 000 machine hours. During the year, 5100 units were produced. Fixed overhead $205 000 Variable overhead $165 750 Actual machine hours 19 800 What was Carvelle's variable overhead spending variance? Select one: O A. $7350 unfavourable O B. $4800 favourable O C. $7350 favourable O D. $2550 unfavourable