#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; //Hidden rule
        }
    }
    printf("%.2f",total);
    return 0;
    }