#include<stdio.h>
3include<ctype.h>
struct order{
    char name[100];
    int id;
    float price;
};
int mani(){
    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;
    
}