#include<stdio.h>
struct product{
    char name[20];
    int id;
    float price;
    };
    int main(){
    int n,i,total;
    scanf("%d",&n);
    if(n<0){
    printf("Invalid input");
    return 0;
    }
    struct product arr[n];
    float total = 0;
    scanf("%s %d %f",arr[i].name,&arr[i].id,&arr[i].price);
    total+=arr[i].price;
    }
    printf("%.2f",total);