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1. I have checked “Last minute deal” element issue. To show element you need to add discount value when add new item. You can see my attachment.
This element will retrieve the item that has the most discount and most recently
2. I have checked your currency exchange issue. I can see your setting is not correct. You can refer our document for more details:
3. When you set “The average price of hotel” option is “On” you need to set price for all room was assigned to hotel.
4. I don’t understand your google map issue. Please description more details so i can help you better.