#include<stdio.h>
#include<str
struct Employee
{
    char name[50];
    int id;
    int type;
    union
    {
        float fullSalary;
        float hourlyRate;
    }pay;
};
int main()
{
    int n;
    scanf("%d", &n);
    if(n < 0)
    {
        printf("-1");
        return 0;
    }
    struct Employee emp;
    float total=0.0;
    for(int i=0;i<n;i++)
    {
        scanf("%s", emp.name);
        scanf("%d %d", &emp.id, &emp.type);
        if(emp.type == 1)
        {
            scanf("%f", &emp.pay.fullSalary);
            total += emp.pay.fullSalary;
        }
        else if(emp.type == 2)
        {
            float hours;
            scanf("%f", &emp.pay.hourlyRate);
            scanf("%f", &hours);
            total += emp.pay.hourlyRate*hours;
        }
    }
        printf("%.2f\n", total);
        return 0;
}