#include<stdio.h>
#include<stdlib.h>
#include<string.h>
 unoin SalaryDetails {
     int fullTimeSalary;
     float partTimeSalary;
 };
 struct Employee{
     char name[50];
     int id;
     int type;
     union SalaryDetails details;
 };
 int main (){
     int n;
     if(scanf("%d",&n) !=1)return 1;
     
     if(n<0){
         printf("-1\n");
         return 0;
     }
     struct Employee employees;
     float tatalSalaries=0.0;
     for(int i=0;i<n;i++){
        if(scanf("%s %d %d",employee[i].name,&employees[i].id,&employee[i].type)!=3)return 1;
        
        if(employees[i].type==1){
            if(scanf("%d",&employees[i].details.fullTimeSalary)!=1)return 1;
            totalSalaries+=employees[i].details.fullTimesalary;
        }
        else if(employees[i].type==2){
            if(scanf("%f",&employees[i].deatils.partTimeHourlyRate)!=1)return 1;
            totalSalaries+=employees[i].details.partTimeHourlyRate*40.0;
        }
     }
     printf("%.2f\n",totalSalaries);
     return 0;
 }