#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;
}