#include<stdio.h>
union salary {
    int fullTimesalary;
    float partTimeRate;
};
struct Employee {
    char name[1000];
    int id;
    int type;
    union salary payment ;
};
int main(){
    int n;
    scanf("%d",&n);
    if(n<0){
        printf("-1");
        return 0;
    }
    struct Employee emp;
    double totalSalary=0.0;
    for(int i=0;i<n;i++){
        scanf("%s %d %d",emp.name,&emp.id,&emp.type);
        if(emp.type==1){
            scanf("%d",&emp.payment.fullTimeSalary);
            totalSalary +=emp.payment.fullTimeSalary;
        }
        else
        {
            scanf("%f",&emp.paayment.partTimeRate);
            totalSalary+=emp.payment.partTimeRate;
        }
    }
    printf("%.2f",totalSalary);
    return 0;
}