Pearl Co. produces pearl necklaces and uses a standard cost system. Fixed overhead is applied to production at a rate of $34.20 per unit, based on budgeted production of 2,965 per month. During December, Pearl produced 3,180 pearl necklaces. Fixed overhead incurred totaled $113,560. a. Calculate the fixed overhead spending variance. (Do not round intermediate calculations and round your final answer to the nearest dollar amount. Indicate the effect of variance by selecting "Favorable", "Unfavorable", or "None" for no effect (i.e., zero variance).) b. Calculate the fixed overhead volume variance. (Do not round intermediate calculations and round your final answer to the nearest dollar amount. Indicate the effect of variance by selecting "Favorable", "Unfavorable", or "None" for no effect (i.e., zero variance).) c. Calculate the over- or under-applied fixed overhead.