11340

#include <iostream>
#include <cstdio>
#include <cstring>
#include <string>
#include <map>

using namespace std;
map<char,int> mp;

int main()
{
	int t,n,k,val;
	char c;

	cin>>t;
	getchar();
	while(t--)
	{
		cin>>n;
		getchar();
		mp.clear();
		while(n--)
		{
			scanf("%c %d",&c,&val);
			getchar();
			mp=val;
		}
		cin>>k;
		getchar();
		double ans=0;
		while(k)
		{
			c=getchar();
			if(c=='\n')
			k--;
			else
			ans+=mp;
		}
		printf("%.2lf$\n",ans/100);
	}

	return 0;
}