#include<stdio.h>
#include<string.h>
union payInfo
{
    int fullTimeSalary;
    float partTimeRate;
};
struct Employee
{
    char name[50];
    int id;
    int type;
    union payInfo pay;
};
int main()
{
    int n;
    scanf("%d", &n);
    struct Employee emp;
    float total=0.0;
    for(int i=0;i<n;i++)
    {
        scanf("%s %d %d", emp.name, &emp.id, &emp.type);
        if(emp.type == 1)
        {
            scanf("%d",&emp.pay.fullTimeSalary);
            total+=emp.pay.fullTimeSalary;
        }
        else if(emp.type==2)
        {
            int hours;
            scanf("%f", &emp.pay.partTimeRates);
            scanf("%d", &hours);
            total+=emp.pay.partTimeRate * hours;
        }
    }
    printf("%.2f",total);
    return 0;
}