please show all workings thank you

Question 2 - Overhead Rates Calculate the below Aggregate manufacturing firm uses job order costing system. The company uses machine hours to apply overhead cost to jobs. At the beginning of 2015, the company estimated that 50,000 machine hours would be worked and $850,000 overhead cost would be incurred during 2015. Required I. The predetermined overhead rate. II. The firm got a job in February that requires 225 machine hours. Calculate the overhead cost assigned to that job. III. The firm got a job in May that requires 125 machine hours. Calculate the overhead cost assigned to that job