How do you calculate MRR given many of the extensions you display are just a one time purchase? That's not recurring revenue. For example, if an extension has

How do you calculate MRR given many of the extensions you display are just a one time purchase? That's not recurring revenue. For example, if an extension has 1000 users and is priced at $5, that's not $5000 MRR. This only tells that the extension earned approximately $5000 since it got published in the store.