#include "bits/stdc++.h"
using namespace std;
#define int long long
#define endl '\n'
int mod=1e9+7;
int mod2=998244353;
const int INF=1e9;

signed main(){
  int n;
  cin>>n;
  double ans=0;
  for(int i=0;i<n;i++){
    double a;
    string s;
    cin>>a>>s;
    if(s=="JPY")ans+=a;
    else ans+=a*380000.0;
  }
  cout<<ans<<endl;
}

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