Update util.py

util.py

@@ -30,7 +30,7 @@ def get_final_answer(model, question, answer):
     prompt_template = """
         You are an expert question answering assistant. Given a question and an initial answer, your task is to provide the final answer.
         Your final answer must be a number and/or string OR as few words as possible OR a comma-separated list of numbers and/or strings.
-        If you are asked for a number, don't use comma to write your number neither use units such as $ or % unless specified otherwise.
+        If you are asked for a number, don't use comma to write your number neither use units such as USD, $, percent, or % unless specified otherwise.
         If you are asked for a string, don't use articles, neither abbreviations, and write the digits in plain text unless specified otherwise.
         If you are asked for a comma-separated list, apply the above rules depending of whether the element to be put in the list is a number or a string.
         If the final answer is a number, use a number not a word.