#include <iostream>
#include <algorithm>
using namespace std;
 
int main()
{
    char d;
    int p,n,ps,ns,c;
     
    ps=ns=c=0;
    while(cin >> p >> d >> n)
    {
        ps+=p*n;
        ns+=n;
        c++;
    }
    cout << ps << endl << (int)((double)ns/c+0.5) << endl;
}