#include<stdio.h>
#include<string.h>
union salary{
    int full_time_salary;
    float hourly_rate;
};
struct Employee{
    char name[50];
    int id;
    int type;
    union salary pay;
};
int main(){
int n;
scanf("%d",&n);
if(n<0){
    printf("-1");
    return 0;
}
struct Employee emp[n];
float total=0.0;
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);total+=emp[i].pay.full_time_salary;
    }
    else if(emp[i].type==2){
        scanf("%f",&emp[i].pay.hourly_rate);
        total+=emp[i].pay.hourly_rate*8*30;
    }
    }
    printf("%.2f",total);
    return 0;
}