#include<stdio.h>
union Salary {
    int full_time_salary;
    float hourly_rate;
};

struct Empolyee {
    char name[100];
    int id;
    int type;
    union Salary sal;
};
int main(){
    int n;
    scanf("%d", &n);
    
    if(n < 0) {
        printf("-1");
        return 0;
    }
    
    struct Empolyee emp;
    double 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.sal.full_time_salary);
            totel+=emp.sal.full_time_salary;
        }
        else if(emp.type == 2) {
            scanf("%f",&emp.sal.hourly_rate);
            total += emp.sal.hourly_rate;
        }
    }
    
    printf("%.2f", total);
    return 0;
}