#include <stdio.h>
#include<ctype.h>
struct order
{
    char name[100];int id;float price
    
};
int main()
{
    int n, scanf("%d",&n);
    if(n<=0)
    {
        printf("Invalid input");
        return 0
    }
}
    struct order o[n];
    float total=0;
    for(int i=0;i<n;i++)
    {
        scanf("%s %d %f"o[i].name,&o[i].id,&o[i].price);
    }
    for(int j=0;o[i]name[j];j++)
    {
        if(isalpha(o[i].name[j]))
        {
            printf("Invalid input");
            return 0;
        }
            total+=o[i].price;
    }
    printf("%.2f",total);
    return 0;

}