/** Header Files */

//#include<bits/stdc++.h>
#include<vector>
#include<list>
#include<map>
#include<set>
#include<queue>
#include<deque>
#include<stack>
#include<bitset>
#include<algorithm>
#include<iostream>
#include<iomanip>
#include<cstdio>
#include<cmath>
#include<cstdlib>
#include<iterator>
#include<cctype>
#include<climits>
#include<string>
#include<sstream>
#include<cstring>
#include<ctime>
#include<numeric>
#include<stdint.h>
#include<unordered_map>
#include<unordered_set>
using namespace std;

/*** Macro Star Here */


#define     Boost               ios::sync_with_stdio(false),cin.tie(NULL),cout.tie(NULL)
#define     all(cont)           cont.begin(),cont.end()
#define     rall(cont)          cont.rbegin(),cont.rend()
#define     FOR(i,j,k,in)       for (int i=j ; i<k ; i+=in)
#define     RFOR(i,j,k,dec)     for (int i=j ; i>=k ; i-=dec)
#define     REP(i, j)           FOR(i,0,j,1)
#define     RREP(i, j)          RFOR(i,j,0,1)
#define     itloop(it,cont)     for(__typeof((cont).begin()) it = (cont).begin(); it != (cont).end(); it++)
#define     foreach(cont)       for(auto &value: cont)
#define     mk                  make_pair
#define     pb                  push_back
#define     sortArr(arr, sz)    sort(arr , arr+sz )
#define     min3(a,b,c)         min(min(a,b),c)
#define     min4(a,b,c,d)       min(min(a,b),min(c,d))
#define     max3(a,b,c)         max(max(a,b),c)
#define     max4(a,b,c,d)       max(max(a,b),max(c,d))
#define     flush               cin.ignore(numeric_limits<streamsize>::max(), '\n')
#define     memz(x)             memset(x, 0, sizeof(x))
#define     memneg(x)           memset(x, -1, sizeof(x))
#define     came                cout<< "Came Here" << endl
#define     show(val)           cout<< #val << " -> " << val << endl
#define     MOD                 (int)(1e9 + 7)
#define     ff                  first
#define     ss                  second
#define     Case                cout<< "Case "<< ++cs << ": "

/*** Geometry & Maths */

#define     gcd(a,b)            __gcd(a,b)
#define     lcm(a,b)            (a*b)/gcd(a,b)
#define     pi                  acos(-1.0)
#define     sq(x)               ((x)*(x))
#define     dis(x1,y1,x2,y2)    sqrt(sq(x1-x2) * (y1-y2))
#define     t_area(a,b,c,s)     sqrt(s*(s-a)*(s-b)*(s-c)) // s = (a+b+c)/2.0
#define     t_angle(a,b,c)      acos((sq(a)+sq(b)-sq(c))/(2*a*b)) // return C in radian . it is anti clockwise formatted.


/**typedef starts here*/

typedef     long long                   ll;
typedef     unsigned long long          ull;
typedef     pair <int, int>             PII;
typedef     vector <int>                VI;
typedef     vector <string>             VS;
typedef     vector < PII>               VII;
typedef     map < string , int >        MSI;
typedef     map < int ,int >            MII;
typedef     set < int >                 SETI;
typedef     multiset < int >            MSETI;

typedef     priority_queue<int,vector<int>,greater<int> > min_heap;

/**typedef ends here*/
const ll INF = (1LL<<60)-1 ;



//#define DEBUG
int main()
{
    //Boost;

    #ifdef DEBUG
    freopen("input.txt","r",stdin);    // Read
    freopen("output.txt","w",stdout);  // Write
    #endif

    int n ;
    cin>> n ;

    double sum = 0 ;
    while(n--){
        double x ;
        string str ;
        cin>> x >> str ;
        if(str == "JPY")
            sum += x ;
        else{
            x *= (380000*1.0) ;
            sum += x ;
        }
    }

    cout<<fixed << setprecision(6) << sum << endl ;

    return 0;
}


Measured memory_bytes: 256