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