#include<stdio.h>
union Salary{
    int full_time_salary;
    float hourly_rate;
};
struct Employee{
    char name[50];
    int id;
    int type;
    union Salary sal;
};
int main()
int n;
scanf("%d",&n);
if (n <= 0){
    printf("-1");
    return 0;
}
struct Employee e[100];
float total = 0;
for(int i=0;i<n;i++)
{
    scanf("%s %d %d",e[i].name,&e[i].id,&e[i].type);
    if(e[i].type == 1){
        scanf("%d",&e[i].sal.full_time_salary);
        total += e[i].sal.full_time_salary;
    }else{
        scanf("%f",&e[i].sal.hourly_rate);
        total += e[i].sal.hourly_rate*20;
        
      }
  }
  printf("%.2f",total);
  return 0;
 }