I need help, I keep getting these wrong.

Required information (The following information applies to the questions displayed below.) The Gilster Company, a machine tooling firm, has several plants. One plant, located in St. Cloud, Minnesota, uses a job order costing system for its batch production processes. The St. Cloud plant has two departments through which most jobs pass. Plant-wide overhead, which includes the plant manager's salary, accounting personnel, cafeteria, and human resources, is budgeted at $250,000. During the past year, actual plantwide overhead was $240,000. Each departments overhead consists primarily of depreciation and other machine-related expenses. Selected budgeted and actual data from the St. Cloud plant for the past year are as follows. Department Department B $ 162,000 170,000 $ 546,000 564,000 Budgeted department overhead (excludes plantwide overhead) Actual department overhead Expected total activity: Direct labor hours Machine-hours Actual activity: Direct labor hours Machine-hours 54,000 12,000 15,000 52,000 55,500 12,700 14,000 54,000 the sales force create bids for For the coming year, the accountants at the St. Cloud plant are in the process of several jobs. Projected data pertaining only to job no. 110 are as follows. $21,000 36,000 10,800 Direct materials Direct labor cost: Department A (2,400 hr) Department B (800 hr) Machine-hours projected: Department A Department B Units produced 160 1,200 11,000 Assume the St. Cloud plant uses three separate overhead rates to assign overhead costs to jobs. b-1. Find the plant wide overhead rate by using expected machine hours. b-2. Find the department overhead rate using expected machine hours for Department A and Department B. b-3. Calculate the projected manufacturing costs per unit for job 110 using the three separate rates computed in b-1 and 6-2. Complete this question by entering your answers in the tabs below. Req B1 Req B2 Req B3 Find the plant wide overhead rate by using expected machine hours. (Round your answer to 2 decimal places.) Plantwide overhead rate $ 8.63 per machine hour