#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", &temp.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;
}