In addition to other costs, grosha telephone company planned to incur $600,000 of fixed manufacturing overhead in making 500,000 telephones. grosha actually produced 508,000 telephones, incurring actual overhead costs of $599,400. grosha establishes its predetermined overhead rate based on the planned volume of production (expected number of telephones).requireda. 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 . 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 . predetermined overhead rate per unitb. total fixed cost spending variance c. total fixed cost volume variance

Please find the detailed answer as follows:

Explanation:

a) Predetermined overhead rate = Estimated manufacturing overhead cost   / Estimated total units in the allocation based

Predetermined overhead rate = 600,000 / 500,000 = 1.2 perunit

b) Total fixed cost spending variance = Actual fixed overhead cost - Estimated overhead cost

                                                         = 599,400 - 600,000

                                                         = 600 (F) Favourable

c) Total fixed cost volume variance = Actual fixed overheads - Estimated fixed overheads

  Actual fixed overheads = Estimated fixed overhead rate * Actual units produced

                                        = 1.2 * 508,000 = $609,600

Total fixed cost volume variance =$ 609,600 - $600,000 = $9600 (F) Favourable

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answer90,000;