#include <stdio.h>
#include <string.h>
union Salary {
    int full_time;
    float part_time;
};
struct Employee {
    char name[50];
    int id;
    int type;   
    union Salary ;
};

int main() {
    int n;
    scanf("%d", &n);
    if (n < 0) {
        printf("-1");
        return 0;
    }

    struct Employee emp[20];
    float total = 0;

    for (int i = 0; i < n; i++) {
        scanf("%s %d %d", emp[i].name, &emp[i].id, &emp[i].type);

        if (emp[i].type == 1) {   // Full-time
            scanf("%d", &emp[i].sal.full_time);
            total += emp[i].sal.full_time;
        } 
        else if (emp[i].type == 2) {  // Part-time
            scanf("%f", &emp[i].sal.part_time);
            total += emp[i].sal.part_time;
        }
    }

    printf("%.2f", total);

    return 0;
}