#include<stdio.h>
union salary{
    int full_salary;
    float hourly_rate;
};
struct Employee {
    char name[50];
    int id;
    int type;
    union Salary 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 %d %d",emp.name,&emp.id,&emp.type);
        if(emp.type == 1) {
            scanf("%d",&emp.pay.full_salary);
            total += emp.pay.full_salary;
        }
        else if(emp.type == 2) {
            scanf("%f", &emp.pay.hourly_rate);
            total += emp.pay.hourly_rate;
        }
    }
    printf("%.2f",total);
    return 0;
}