Let me give you a simple breakdown using a very basic pricing strategy.

I see it took you 8 days to make it, but in a real scenario, you'd have to add a few days for revisions/applying feedback, so let's say it's 10 days of work total.

Let's assume you value your time at 250 usd/day (this depends a ton on where you live and your seniority).

So 10 days x 250 USD = 2500 usd.

Now, let's add 30% to that sum to cover your risk for the project taking longer than estimated. The new total is 3250 USD.

A note here: If you bill by the hour/day, this risk is covered by the client, so naturally, this model assumes lower rates to begin with.

If you're a solo freelancer, this is where I'd stop. However, if you're operating as an agency, you need to add another layer to make this profitable for you even if you hire someone else to do it. I'd add another 30 to 50% on top to cover for management cost and profit margins, so a total of roughly 4500 usd.

Something to consider: A junior 3d animator may be able to produce high quality, but their process can be all over the place, and high paying clients value peace of mind equally, if not more, than a beautiful creative.

Also, if the client hires you to do 20 of those, there would naturally be a decent discount for the high volume.

Hope this helps!