how to solve this exercise ??

2)

4-18 Job costing, normal and actual costing. Anderson Construction assembles residential houses. It uses a job-costing system with two direct-cost categories (direct materials and direct labor) and one indirect-cost pool (assembly support). Direct labor-hours is the allocation base for assembly support costs. In December 2013, Anderson budgets 2014 assembly-support costs to be $8,000,000 and 2014 direct labor- hours to be 160,000. At the end of 2014, Anderson is comparing the costs of several jobs that were started and completed in 2014. Laguna Model Mission Model Construction period Feb-June 2014 May-Oct 2014 Direct material costs $106,650 $127,970 Direct labor costs $ 36,276 $ 41,750 Direct labor-hours 920 1,040 Direct materials and direct labor are paid for on a contract basis. The costs of each are known when direct materials are used or when direct labor-hours are worked. The 2014 actual assembly-support costs were $7,614,000, and the actual direct labor-hours were 162,000.Required 1. Compute the (a) budgeted indirect-cost rate and (b) actual indirect-cost rate. Why do they differ? 2. What are the job costs of the Laguna Model and the Mission Model using (a) normal costing and (b) actual costing? 3. Why might Anderson Construction prefer normal costing over actual costing?4-19 Budgeted manufacturing overhead rate, allocated manufacturing overhead. Gammaro Company uses normal costing. It allocates manufacturing overhead costs using a budgeted rate per machine-hour. The following data are available for 2014: Budgeted manufacturing overhead costs $4,200,000 Budgeted machine-hours 175,000 Actual manufacturing overhead costs $4,050,000 Actual machine-hours 170,000 Required 1. Calculate the budgeted manufacturing overhead rate. 2. Calculate the manufacturing overhead allocated during 2014. 3. Calculate the amount of under- or overallocated manufacturing overhead. Why do Gammaro's managers need to calculate this amount