#include<iostream.h>
void main()
{
double sum = 0 , money;
for(int month = 1 ; month <= 12 ; month ++ )
{
cin>>money;
sum += money;
}
cout<<'$'<<(double)sum/12;
}
#include<iostream.h>
void main()
{
double sum = 0 , money;
for(int month = 1 ; month <= 12 ; month ++ )
{
cin>>money;
sum += money;
}
cout<<'$'<<(double)sum/12;
}