#include<stdio.h>

typedef struct Stuffs{
    char name[20];
    int id;
    float price;
}ran;

int main(){
    int size;
    float sum =0;
    scanf("%d",&size);
    if(size<0){
        printf("Invalid input");
        return 0;
    }
    ran prod[40];
    for(i=0;i<size;i++){
        scanf("%s\n",prod[i].name);
        scanf("%d\n",prod[i].id);
        scanf("%.2f\n",prod[i].price);
        sum += prod[i].price;
    }
    printf("%.2f",sum);
    return 0;
}