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Variable Overhead Variances

Assume that the best cost driver that Sony has for variable factory overhead in the assembly department is machine hours. During April, the company budgeted $590,000$ machine hours and $$7,000,000$ for its Texas plant's assembly department. The actual variable overhead incurred was $$7,200,000,$ which was related to $600,000$ machine hours.

Do not round until your final answers. Round your answers to the nearest dollar.

$($a$)$ Determine the variable overhead spending variance.

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$($b$)$ Determine the variable overhead efficiency variance.