#include <stdio.h>
struct Employee {
    char name[51];
    int id;
    int type;
    union {
        float fullTimeSalary;
        float hourlyRate;
    } pay;
};
int main() {
    int n;
    if (scanf("%d", &n) != 1) 
    return 0;
    if (n < 0) {
        printf("-1");
        return 0;
    }
    struct Employee emp;
    float total = 0.00f;
    for (int i - 0; i < n; i++) {
        if (scanf("%s %d %d", emp.name, &emp.id, &emp.type) != 3)
        return 0;
        if (emp.type == 1) {
            scanf("%f", &emp.pay.fullTimeSalary);
            total += emp.pay.fullTimeSalary;
        } else if (emp.type == 2) {
            scanf("%f", &emp.pay.hourlyRate);
            total += emp.pay.hourlyRate;
        }
    }
    printf("%.2f", total);
    return 0;
}