please use excel to fjnd answers

PAST EXAM QUESTION \#3: Drew Architectural Design began operations on January 2. The following activity was recorded in the company's Work in Process account for the first month of operations: Drew Architectural Design is a service firm, so the names or the accounts n uses are cunerenu un! the names used in manufacturing companies. Costs of Subcontracted Work is comparable to Direct Materials, Direct Staff Costs is the same as Direct Labour, Studio Overhead is the same as Manufacturing Overhead, and Completed Projects is the same as Finished Goods. Apart from the difference in terms, the accounting methods used by the company are identical to the methods used by manufacturing companies. Drew Architectural Design uses a job-order costing system and applies studio overhead to Work in Process on the basis of direct staff costs. At the end of January, only one job was still in process. This job (the Kareen Corporation Headquarters project) had been charged with $13,500 in direct staff costs. Required: 1. Compute the predetermined overhead rate that was in use during January. 2. Complete the following job cost sheet for the partially completed Kareen Corporation Headquarters project