#include<stdio.h>
union salary{
    float fully_time;
    float hourly_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 emp;
    float total=0.0f;
    for(int i=0;i<n;i++){
        scanf("%s %d %d",emp.name, &emp.id, &emp.type);
        if(emp.type==1){
            scanf("%f",&emp.sal.full_time);
            total+=emp.sal.full_time;
        }
        else if(emp.type==2)
        {
            scanf("%f",&emp.sal.hourly_rate);
            total+=emp.sal.hourly_rate*8.0f*30.0f;
        }
    }
    printf("%.2f",total);
    return 0;
}