BigDecimalの加算について

import java.math.BigDecimal;

public class BigDecimalTest {

	public static void main(String[] args) {
		String[] str 	= {"95.8","54.9","122.1"};
		double sum 	= 0;
		for(int i=0; i<str.length; i++){
			double rate = Double.parseDouble(str[i]);
			sum = Sum(sum, rate);
		}
		System.out.println(sum);
	}
	
	private static double Sum(double d1, double d2){
		BigDecimal bd1 = new BigDecimal(d1);
		BigDecimal bd2 = new BigDecimal(d2);
		bd1 = bd1.add(bd2);
		return bd1.doubleValue();
	}
}