Firstly go to Order History in your menu.
Click on Linc tab.
The Redemptions box shows you how many customer transactions in that time frame.
The Revenue is how much was spent on products during that time frame.
The Spent is how much you have given up on those transactions (commission and cashback).
You can choose dates to filter your search and Date Type.
Order date is when the customer actually placed the order.
The invoice date is when the Linc network picked up the order and therefore the date that is used in invoicing.
Below is a visual representation of your search.