poj 1004

#include<iostream>
#include <iomanip>

using namespace std;
int main()
{
int i=12;
double sum,in,average;
sum=0;
for(int i=0;i<12;i++)
{
cin>>in;
sum+=in;
}
average=sum/12;
cout<<"$";
cout<<fixed<<setprecision(2)<<average<<endl;

system("PAUSE");
return 0;
}