#include<iostream>
using namespace std;
int main()
{
	//freopen("in.txt","r",stdin);
	double num[12],sum=0,a;
	for(int i=0;i<12;i++)
	{
		cin>>num[i];
		sum+=num[i];
		cout<<num[i]<<endl;
	}
	a=sum/12;
	cout<<'$'<<a<<endl;
	return 0;
}