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