Price Calculator for WooCommerce Teams

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My client wanted to show the total price of a multi seat purchase for WooCommerce Teams directly on the page. I thought it would be easy, and then found this starting code I could use to get myself going.

It worked out of the box, but didn't calculate the total price properly since you start with a set quantity of seats for a given product. A quick call to get_post_meta to find the minimum seats for a product let me show the starting price. Then Alexander's code takes over and runs the calculation as the user changes the quantity.