Update app.py

app.py

@@ -58,7 +58,7 @@ COMPREHENSION_QUESTIONS = [
         "correct_index": 2, # 3 weeks
     },
     {
-        "q": "4. At the end of the week, your holding cost is $0.50 per unit, and your backlog cost is $1.00 per unit. If your final inventory is 0 units and you have a remaining Backlog of 15 units, what is your Total Weekly Cost?",
+        "q": "4. At the end of the week, your holding cost is \$0.50 per unit, and your backlog cost is \$1.00 per unit. If your final inventory is 0 units and you have a remaining Backlog of 15 units, what is your Total Weekly Cost?",
         "options": ["$7.50", "$15.00", "$15.50", "$0.00"],
         "correct_index": 1, # 15.00
     },