#include "iostream"
using namespace std;
#define N 20
int main()
{char OriCity[N],DistCity[N],ClassCode,c;
	int Actual_miles,sum;
	while(c!='#') 
   { 
   	sum=0;
   	while(cin.peek()!='0')
     {  scanf("%s %s %d %c",OriCity,DistCity,&Actual_miles,&ClassCode);
     	getchar();
		if(ClassCode=='F')sum+=Actual_miles*2;
         else if(ClassCode=='B')sum+=Actual_miles+(Actual_miles+1)/2;
         else if(ClassCode=='Y')
             {
             	if(Actual_miles<=500)sum+=500;
             	else sum+=Actual_miles;
             }
      }
    getchar();
	 cout<<sum<<endl;
	 	 cin>>c;
   }
   return 0;    
}