500
I will say:
Let me check the departmemt on the status of that item.
If there is NOT a clearance or discontinued tag on the shelf, give the price adjustment using the (Refund) key.
If there is, explain the policy.
All the grilling equipment went on sale August 6th. On August 10th, a customer with a receipt asks for a price adjustment on grilling equipment they bought July 15th.