#include<stdio.h>
union Salary{
    int full_time_salary;
    float hourly_rate;
};
struct Employee {
    char name[50];
    int id;
    int type;
    union Salary sal;
};
int main() {
    int n;
    scanf("%d",&n);
    if(n <= 0) {
        printf("-1");
        return 0;
    }
    struct Employee e[100];
    float total = 0;
    for(int i = 0; i < n; i++){
        scanf("%s %d %d",emp[i].name,&e[i].id,&e[i].type);
        if(e[i].type == 1) {
            scanf("%d",&e[i].sal.full_time_salary);
            total += e[i].sal.full_time_salary;
        }
        else {
            scanf("%f", &e[i].sal.hourly_rate);
            total += e[i].sal.hourly_rate*20;
        }
    }
    printf("%.2f",total);
    return 0;
}