In order to fill out the email statistics in the calculator you will need to input the total number of emails delivered, opened and clicked for the last 12 months. The easiest way to accomplish this is by using the Analyze feature within HubSpot's email tool. Below are details on accessing this data.
In HubSpot's navigation menu click on "Marketing" --> "Email".
On the Email page you'll see "Analyze" --> Click here to bring you to the "Analyze" page.
Underneath "Overview", underneath "Time Range" click on "Last 30 days" and you'll see an option for "Custom time period" --> Click here
Next, you'll want to update the dates of analysis from today's date until today's date a year ago to get a full 12 month picture.
This will provide you with the total number of emails delivered, opened and clicked on in the last 12 months which should be subsequently be put into the calculator.