#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;
}