#include<stdio.h>
struct Employee
{
    char name[50];
    int id;
    int type;
    union
    {
        int 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("%d",&emp.pay.fullSalary);
                total +=emp.pay.fullSalary;
        }
            else if(emp.type == 2)
            {
                scanf("%f", &emp.pay.hourlyRate);
                total += emp.pay.hourlyRate;
            
            }
        }
    }
    printf("%.2f",total);
    return 0;
}