#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", e[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;
}