// editor2
#include<stdio.h>
#include<string.h>
union salary{
    int fulltime;
    float parttime;
};
struct Employee{
    char name[100];
    struct info{
        int id;
        int type;
    }info;
    union salary sal;
};
int main()
{
    int n;
    scanf("%d",&n);
    if(n<0)
    {
        printf("-1");
        return 0;
    }
    struct Employee emp;
    double total=0.0;
    for(int i=0;i<n;i++)
    {
        scanf("%s %d %d",emp.name,&emp.info.id,&emp.info.type);
    
    if(emp.info.type==1)
    {
        scanf("%d",&emp.sal.parttime);
        total+=emp.sal.parttime;
    }
    else if(emp.info.type==2)
    {
        scanf("%f",&emp.sal.parttime);
        total+=emp.sal.parttime;
    }
}
printf("%.2f",total);
return 0;
}