#include <stdio.h>
#include <string.h>
#include <ctype.h>
struct Order{
    char productName[50];
    int productID;
    float price;
};
int isValidName(char name[]){
    for(int i=0;name[i]!='\0';i++){
        if(!isalpha(name[i])){
            return 0;
        }
    }
    return 1;
}
int main(){
    int n;
    scanf("%d",&n);
    if(n<0){
         printf("Invalid input");
         return 0;
    }
   struct Order orders[n];
       float total=0.0;
       for(int i=0;i<n;i++){
           scanf("%s %d %f",orders[i].productName, &orders[i].productID, &orders[i].price);
           if(!isValidName(orders[i].productName)){
               printd("Invalid input");
               return 0;
           }
       
       total+=orders[i].price;
   }
   printf("%.2",total);
   return 0;
}