expected = ["30", "5", "unknown"]
predicted = ["30", "7", "unknown"]
accuracy = sum(a == b for a, b in zip(expected, predicted))/3
truth = {"invoice_id", "total", "currency"}
found = {"invoice_id", "total", "customer_age"}
tp = len(truth & found)
precision, recall = tp/len(found), tp/len(truth)
print("Exact-match accuracy:", round(accuracy, 3))
print("Precision:", round(precision, 3))
print("Recall:", round(recall, 3))