#include<iostream>

using namespace std;

int main(void)
{
	char c;
	int a,b;
	int sum,ave;
	int i;
	sum=ave=i=0;
	while(cin>>a>>c>>b)
	{
		sum+=a*b;
		ave+=b;
		i++;
	}
	cout<<sum<<endl;
	cout<<(int)(((double)ave/i)+0.5)<<endl;
}