The following information relates to Joplin Company for the period just ended: Standard variable overhead rate per hour Standard fixed-overhead rate per hour Planned monthly activity Actual production completed Standard machine processing time Actual variable overhead Actual total overhead Actual machine hours worked $ 1.00 $ 2.00 38,500 machine hours 80,000 units Two units per hour $ 35,805 $116,905 39,000 All of the company's overhead is variable or fixed in nature. Required: A. Calculate the spending and efficiency variances for variable overhead. B. Calculate the budget and volume variances for fixed overhead. (Indicate the effect of each variance by selecting "Favorable" or "Unfavorable". Select "None" and enter "O" for no effect (i.e., zero variance).) A. Spending variance Efficiency variance B. Budget variance Volume variance