// editor3
#include<stdio.h>
#include<ctyp.h>

struct product{
    int id;
    char name[50];
    float price;
};
int main(){
    int n;
    scanf("%d",&n);
    if(n<0){
        printf("Invalid input");
        return 0;
        }
       
        struct product ab[n];
        for(int i=0;i<n;i++){
            scanf("%s %d %f",ab[i].name,&ab[i].id,&ab[i].price);
        }
        float sum=0;
        for(int i=0;i<n;i++){
            sum+=ab[i].price;
            
        }
        printf("%.2f",sum);
        return 0;
}