#include<stdio.h>
#include<ctype.h>
struct Order{
    char name[50];
    int id;
    float price;
    
};
int main(){
    int n;
    float total = 0.0;
    scanf("%d",&n);
    
    if(n < 0){
       printf("Invali inpur");
    return 0;
    }
    struct Order o;
    for(int i=0;i<n;i++){
        scanf("%s %d %f",o.name,&o.id,&o.price);
    for (int j=0;o.name[j] != '\0';j++){
        if(o.name[j] < 'A' ||
           o.name[j] > 'Z' && o.name[j] < 'a') ||
           o.name[j] > 'z'){
            printf("Invalid inpur");
            return 0;
        }
    }
       total += o.price;    
    }
    printf("%.2f",total);
    return 0;
}