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