#include<stdio.h>
union salary{
    int fullTimeSalary;
    float partTimeRate;
};
struct Employee{
    char name[50];
    int id;
    int type;
    union Salary sal;
};
int main(){
    int n,i;
    scanf("%d",&n);
    if (n<0){
        printf("-1");
        return 0;
    }
    struct Employee emp;
    double totalSalary=0.0;
    for(i=0;i<n;i++){
        scanf("%s %d %d",emp.name,&emp.id,&emp.type);
        if(emp.type==1){
            scanf("%d",&emp.sal.fullTimeSalary);
            totalSalary+=emp.sal.fullTimeSalary;
        }else if(emp.type==2){
            scanf("%f",&emp.sal.partTimeRate);
            totalSalary+=emp.sal.partTimeRate;
        }
    }
    printf("%.2f",totalSalary);
    return 0;
}