Will bought 3 college textbooks. One cost $32, one cost $45, and one cost $39. What is the average price of his books? Choose the statement that correctly calculates the average. 
 A($32 + $45 + $39) ÷ 3
 B. $32 + $45 + $39 ÷ 3
 C. $32 ÷ 3 + $45 ÷ 3 + $39
 D. 3 × $32 + $45 + $39