3. Compute the following factory overhead cost variances using three-variance analysis: a. Overhead spending variance. b. Overhead efficiency variance. c. Fixed overhead production volume variance. 4. Compute the total overhead flexible-budget variance and the fixed overhead production volume variance using a two-variance analysis. 5. Using a single overhead account (e. g., Factory Overhead), make proper journal entries for: a. Incurrence of factory overhead costs. b. Application of factory overhead costs to production. c. Identification of overhead variances assuming that the firm uses the four-variance analysis identified in requirement 2. d. Close all factory overhead cost items and their variances of the period if: (1) The firm closes all variances to the Cost of Goods Sold account. (2) The firm prorates variances to the inventory accounts and the Cost of Goods Sold account.