#include<stdio.h>
#include<string.h>
typedef struct product{
    char prodname[100];
    int id;
    float price;
} and;

int main()
 int size,ind;
 float sum=0.0;
 scanf("%d",&size);
 if(size<0 || size>10){
     printf("Invalid input");
     return 0;
 }
and stud(size);
for(ind=0;ind<size;ind++){
    scanf("%s",stud[ind].name);
    char str[20];
    int len;
    strcpy(str,stud.name);
    for(len=0;str[len];len++);
    for(int i=0;i<len;i++){
        if(!((str[i]>=65&&str[i]<=90 || (str[i]>=97&&str[i]<=122)))){
            printf("invalid input");
            return 0;
        }
    }
    scanf("%d",&stud[ind].id);
    scanf("%f",&stud[ind].price);
}

for(ind=0;ind<size;ind++){
    sum=sum+stud[ind].price;
}
printf("%0.2f",sum);
return 0;
}