Hoover Company applies overhead based on direct labor hours and has the following available for the current month: Standard: Direct labor hours per unit 5 Variable overhead per DLH $.75 Fixed overhead per DLH (based on 8,900 DLHs) $1.90 Actual: Units produced 1,800 Direct labor hours 8,900 Variable overhead $6,400 Fixed overhead $17,500 1) Refer to Hoover Company. Compute all the OH appropriate variances using the four-variance approach. 2) Refer to Hoover Company. Compute all the OH appropriate variances using the three-variance approach