Source

Problem Id:1004  User Id:tq 
Memory:40K  Time:0MS
Language:C++  Result:Accepted

Source 

#include<stdio.h>
#include<math.h>
void main(){
	float dollar[12];
	int i;
	float sum=0;
	float average;
	for(i=0;i<12;i++){
		scanf("%f",&dollar[i]);
	}
	for(i=0;i<12;i++){
		sum=sum+dollar[i];
	}
	average=(float)(sum/12);
	printf("$%.2f",average);
}