Please make sure if Lava Directory Manager is up to date.

If there is an update message, please update it.

Please go to dashboard.
Install it and also activate it. ( if you don’t know how to install, please have a look at this post. )

Please Visit  Edit in the ‘Listings’ Menu.

Enter the ‘Payment Calcuation’ setting value below in the listing settings.

Go to the listing details element you want to put this feature in, find ‘Single listing Payment Calculator’ widget in the left panel and drag and drop it.

Then save it clicking the Update button at the bottom of the left panel.

Make sure that the calculator value you just set works fine on the Listing Detail page. If it looks like the picture below, it works well.