Use the following Information of Alfred Industries Standard manufacturing overhead based on normal monthly volume: Fixed ($300, 900 20,000 units) $15.05 variable ($100,000 20,000 units) Units actually produced in current month Actual overhead costs incurred (including $300,000 fixed) month 00 20.05 $383, 800 18,000 units Compute the overhead spending variance and the volume variance. (Indicate the effect of each varlance by selecting "Favorable" or "Unfavorable" Select varlance).) None" and enter "o" for no effect (i.e..zero Overhead spending variance Overhead volume vanance