Managerial Accounting: E20-3 A job order cost sheet for Rolen Company

Managerial Accounting 
A job order cost sheet for Rolen Company is shown below. 
Job No. 92 For 2,000 units 
Date Direct Materials Direct Labor Manufacturing Overhead 
Beg bal Jan. 1 5,000 6,000 4,500 
8 6,000 
12 8,000 6,400 
27 4,000 3,200 
11,000 18,000 14,100 
Cost of completed job: 
Direct materials 13,000 
Direct labor 18,000 
Manufacturing overhead 14,100 
Total cost $45,100 
Unit cost ($45,100 ÷ 2,000) $22.55 

a. On the basis of the foregoing data answer the following questions. 
1.What was the balance in Work in Process Inventory on January 1 if this was the only unfinished job? 
2.If manufacturing overhead is applied on the basis of direct labor cost, what overhead rate was used in each year? 
b. Prepare summary entries at January 31 to record the current year's transactions pertaining to Job No. 92.