Add up the prepaid costs you couldn't get back.
Enter the costs you've already paid that you couldn't get back if the trip or event were cancelled: transportation, accommodation or venue, prepaid food and activities, and supplier deposits.
The total is the money at risk. Cancellation coverage only helps for reasons the policy lists, and it usually needs to be bought soon after the first deposit. Check what you already have, such as a credit card or employer plan.
Nothing you enter is sent or saved. It's an estimate worked out only from your numbers. It isn't advice, a quote or a recommendation.