#include<stdio.h>
union salary{
    int full_time_salary;
    float part_time_rate;
};
struct Employee{
    char name[50];
    int id;
    int type;
    union salary sal;
};
int main(){
    int n;
    scanf("%d", &n);
    if (n<0){
        printf("-1");
        return 0;
    }
    struct Employee e[n];
    float total=0;
    for(int i=0;i<n;i++){
        scanf("%s %d %d",e[i].name, &e[i].id, &e[i].type);
        if(e[i].id<0||e[i].id>9999){
            printf("-1");
            return 0;
        }
        if(e[i].type==1){
            scanf("%d", &e[i].sal.full_time_salary);
            if(e[i].sal.part_time_salary<0||e[i].sal.full_time_salary>1000000){
                printf("-1");
                return 0;
            }
            total +=e[i].sal.full_time_salary;
            }
            else if(e[i].type==2){
                scanf("%f", &e[i].sal.part_time_rate);
                if(e[i].sal.part_time_rate<0||e[i].sal.part_time_rate>500){
                    printf("-1");
                    return 0;
                }
                total +=e[i].sal.part_time_rate;
            }
            else{
                printf("-1");
                return 0;
            }
        }
        printf("%.2f", total);
        return 0;
}