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