How get common sum of stripe express in callback control action

I added "stripe/stripe-php": "^7.2" to my Laravel 5.8 app and looking how stripe works https://stripe.com/docs/legacy-checkout/php I see example with sum :

 $charge = \Stripe\Charge::create([
      'customer' => $customer->id,
      'amount'   => 5000,
      'currency' => 'usd',
  ]);

but above code in control action is triggered in callback redirect stripe method. That is different control when I calculated total sum(several product on different sun can be selected ) and show view with “Pay with Card” button. Question is how to send $5000 to this control action ? I suppose I can remember $5000 in sessions and read it callback control action, but is it good way?

Also are some other fields like description, items list which can be sent to stripe request?

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