Problem 15-25 (Algo) Fixed overhead variances-various issues LO 15-5, 156 Graystone's production budget for September called for making 39,300 units of a single product The firm's production standards allow one-half of a machine hour per unit produced. The fixed overthead budget for September was $33,798. Graystone uses an absorption costing system, Actual activity and costs for September were: Units produced Fixed overhead costs incurred 35,778537,109 Required: a. Calculate the predetermined fixed overhead application rate per machine hour that would be used in Septembec Note: Round your answer to 2 decimal places. b. Calculate the number of machine hours that would be allowed for actual September production. c. Calculate the fixed overhead applied to work in process during September. Note: Do not round intermediate calculations. d. Calculate the over- or underapplied fixed overthead for September. Note: Do not round intermediate calculations. e. Colculate the fixed overthead budget and volume variances for Septembet, Note: Do not round intermediate calculations. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (l.e., zero variance)