#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].namw,&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;
}