#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 if (e[i].type == 2)
                scanf("%f", &e[i].sal.hourly_rate);
                total += e[i].sal.hourly_rate*20;
            }
        }
           
        printf("%.2f", total);
        return 0;
    }