#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 o;
        }
    }
    return 1;
}
int main(){
    int n;
    scanf(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, &order[i].productID, &orders[i].price);
        if(!isvalidName(order[i].productName)){
            printf("Invalid input");
            return 0;
        }
    totel += orders[i].price;
    }
    printf("%.2f",total);
    return 0;
}