#include<stdio.h>
#include<stdlib.h>
int main(){
    int n;
    scanf("%d",&n);
    if(n<0){
        printf("-1\n");
        return 0;
    }
    double total_salary=0.0;
    for (int i=0; i < n; i++){
        char name[100];
        int id,type;
        scanf("%s %d %d",name, &id, &type);
        if(type == 1){
            scanf("%d",&salary);
            total_salary += salary;
        }elseif(type == 2){
            float hourly_rate;
            scanf("%f",&hourly_rate);
            totalSalary += hourly_rate* 2080;
        }
    }
    printf("%.2f\n",total_salary);
    return 0;
}