#include <bits/stdc++.h>

using namespace std;

#define all(v) v.begin(), v.end()
#define forsn(i, s, n) for(int i=s;i<int(n);i++)
#define forn(i, n) forsn(i, 0, n)

typedef long long tint;

int main(){
    int tc; cin >> tc;
    while(tc--){
        int n; cin >> n;
        vector<int> c (258, 0);
        forn(i, n){
            char a; int x; cin >> a >> x;
            c[(int)(a)] = x;
        }
        int m; cin >> m;
        long long cost = 0;
        m++;
        string s;
        while(m--){
            getline(cin, s);
            forn(i, int(s.size())){
                cost+=c[(int)(s[i])];
            }
        }
        cout << fixed << setprecision(2) << cost/100.0 << "$" << "\n";
    }
}