#include<stdio.h>
union salary {
    int full_time_salary;
    float bourly_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;// Hidde rule
            
        }
    }
    printf("%.2f",total);
    return 0;
}