Weinsterin, Inc., produces chemicals for large biotech companies. It has the following data for manufacturing overhead costs during August 2017: (Click the icon to view the data.) Requirement Fill in the blanks. Use F for favorable and U for unfavorable: (Click the icon to view the table.) (If no variance exists leave the dollar value blank. Label the variance as favorable (F), unfavorable (U) or never a variance (N).) Variable (1) Spending variance (2) Efficiency variance (3) Production-volume variance (4) Flexible-budget variance (5) Underallocated (overallocated) manufacturing overhead