#include<stdio.h>
union Info {
    int full_salary;
    float hourly_rate;
};
struct Employee {
    char name[50];
    int id;
    int type;
    union Info Info;
};
int main() {
    int n;
    scanf("%d", &n);
    if (n < 0) {
        printf("-1");
        return 0;
    }
    struct Employee e[10];
    float total = 0;
    for (int i = 0; i < n; i++) {
        scanf("%s", e[i].name);
        scanf("%d %d", &e[i].id, &e[i].type);
        if(e[i].type == 1) {
            scanf("%d", &e[i].info.full_salary);
            total += e[i].info.full_salary;
        } else {
            scanf("%f", &e[i].info.hourly_rate);
            total += e[i].info.hourly_rate;
        }
    }
    printf("%.2f", total);
    return 0;
}