#include <bits/stdc++.h>
using namespace std;
int main()
{
int t;
scanf("%d",&t);
while(t--)
{
int n,c;
scanf("%d%d",&n,&c);
map<string,double> prices;
while(n--)
{
char s[10];
double x;
scanf("%10s",s);
cin>>x;
prices[s]=x;
}
prices["JD"]=1.0;
double ans=0;
while(c--)
{
char s[10];
double x;
cin>>x;
scanf("%10s",s);
ans += x*prices[s];
}
cout<<fixed<<setprecision(6)<<ans<<endl;
}
return 0;
}
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