// editor2
#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;
    }