In addition to other costs, Zachary Telephone Company planned to incur $420,070 of fixed manufacturing overhead in making 353,000 telephones. Zachary actually produced 361,000 telephones, incurring actual overhead costs of $413,070. Zachary establishes its predetermined overhead rate based on the planned volume of production (expected number of telephones). Required: a. Calculate the predetermined overhead rate. (Round your answer to 2 decimal places.) b. Determine the fixed cost spending variance and indicate whether it is favorable (F) or unfavorable (U). (Select "None" if there is no effect (i.e., zero variance).) c. Determine the fixed cost volume variance and indicate whether it is favorable (F) or unfavorable (U). (Select "None" if there is no effect (i.e., zero variance).) a. per unit b. Predetermined overhead rate Total fixed cost spending variance Total fixed cost volume variance c