Adding up the checkout!

[phatgg221]

Hi, I just have a quick question.
I'm working with the Polar.sh SDK in my application and need guidance on the best way to implement a quantity-based subscription model.

My goal is to have a single product, for example, a "Pro Seat" that costs $8/month. I want a customer to be able to subscribe to a variable quantity of this product, for instance, 5 seats.

The ideal checkout flow would be:

The customer chooses to buy 5 seats.
My application creates a checkout session.
The Polar checkout page shows the calculated total price upfront: 5 seats * $8 = $40/month.
The customer pays this $40 total immediately to start the subscription for all 5 seats.
I've explored the documentation, and while I see clear support for one-time payments and post-paid Metered Billing, I can't find a direct example of passing a quantity parameter to api.checkouts.create() to achieve this upfront calculation.

My question is: What is the recommended pattern in Polar to create a checkout for a single subscription product with a specific quantity, where the total price is calculated and charged upfront?