#include <iostream>
using namespace std;
int N;
int A[6] = {1,2,3,4,5,6};
int AC[6] = {500,300,200,50,30,10};
int B[6] = {1,2,4,8,16};
int BC[6] = {512,256,128,64,32};
int main(){
cin >> N;
int a, b;
for(int i=0; i<N; i++){
cin >> a >> b;
int tmp = 0;
int tmpA = 0, tmpB = 0;
for(int j=0; j<sizeof(A)/sizeof(A[0]); j++){
tmpA += A[j];
if(a <= tmpA && a != 0){
tmp += AC[j];
break;
}
}
for(int j=0; j<sizeof(B)/sizeof(B[0]); j++){
tmpB += B[j];
if(b <= tmpB && b != 0){
tmp += BC[j];
break;
}
}
cout << tmp * 10000 <<"\n";
}
return 0;
}