#include<stdio.h>

union Salary{
    int full_time_salary;
    float hourly_rate;
};
struct Employee{
    char name[50]
    int id;
    int type;
    union Salary sal;
};
int main()
int n;
sacnf("%d",&n);
if(n <= 0){
    printf("-1");
    return 0;
}
struct Employee e[100];
float total = 0;
for(int i = 0;i < n;i++){
    scanf("%s %d %d",e[i].name,&e[i].id,&e[i].type);
    if (e[i].type == 1){
        scanf("%d",&e[i].sal.full_time_salary);
        total += e[i].sal.full_time_salary;
    }else{
        scanf("%f",&e[i].sal.hourly_rate);
        total += e[i].sal.hourly_rate*20; 
    }
}
printf("%.2f",total);
return 0;
}