// editor3
#include<stdio.h>
#include<ctype.h>
#include<string.h>

struct pro{
    char pname[100];
    int id;
    float price;
};
int isvalidName(char *name)
{
    for(int i=0;name[i]!='\0';i++)
    {
        if(!isalnum(name[i]))
            return 0;
      }
    }
        return 1;
}
int main()
{
    int n;
    scanf("%d",&n);
    if(n<=0 || n>10)
    {
        printf("Invaild input");
        return 0;
    }
    struct pro p[n];
    float total=0.0;
    for (int i=0;i<n;i++)
    {
        scanf("%s %d %f",p[i].pname,&p[i].id,&p[i].price);
        if(!isvalidname(p[i].pname)){
            printf("Invalid input");
            return 0;
        }
        total+=p[i].price;
    }
   printf("%.2f\n",total);
}