Answer:
1. $590
2. $9.83
Step-by-step explanation:
1. 
Total Number of Direct Labor Hours: 
= Total Labor Cost ÷ Labor Rate Per Hour 
= 150 ÷ 15 
= 10 Hours 
 
Total Overheads: 
= Total Number of Direct Labor Hours*Predetermined Overhead Rate 
= 10 × 21 
= 210 
 
Total Manufacturing Cost = 230 + 150 + 210 
 = $590
2. 
Average Cost: 
= Total Manufacturing Cost ÷ Number of Units 
= 590 ÷ 60 
= $9.83