#include<stdio.h>

union salary {
    int full_time_salary;
    float hourly_rate;
};

struct Employee {
    char name[50];
    int id;
    int type;
    float amount;
};

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", e[i].name);
        scanf("%d %d", &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;
}