Mifflin, Inc., costs products using a normal costing system. The following data are available for last year:
Budgeted:
Overhead ........ $ 728,000
Machine hours ...... 140,000
Direct labor hours ....... 26,000
Actual:
Overhead ........ $ 726,000
Machine hours ...... 137,000
Direct labor hours ....... 25,100
Prime cost ......... . $3,500,000
Number of units ...... 500,000
Overhead is applied on the basis of direct labor hours.

Required:
1. What was the predetermined overhead rate?
2. What was the applied overhead for last year?
3. Was overhead over- or underapplied, and by how much?
4. What was the total cost per unit produced? (Carry your answer to four decimal places.)