#include <stdio.h>
union Salary
{
    int fullTimeSalary;
    float partTimeRate;
};
struct Employee
{
    char name[100];
    int id;
    int type;
    union Salary salary;
};
int main()
{
    int n;
    scanf("%d", &n);
    if (n < 0)
    {
        printf("-1\n");
        return 0;
    }
    struct Employee d[n];
    float s = 0.0;
    for (int i = 0; i < n; i++)
    {
        scanf("%s %d %d", d[i].name, &d[i].id, &d[i].type);
        if (d[i].type == 1)
        {
            scanf("%d", &v[i].salary.fullTimeSalary);
            s += d[i].salary.fullTimeSalary;
        } else if (d[i].type == 2)
        {
            scanf("%f", &v[i].salary.partTimeRate);
            s += d[i].salary.partTimeRate * 20;
        }
    }
    printf("%.2f\n", s);
    return 0;
}