Stripe charge and subscribe customer to muliple plans at once

Question

I'm new to Stripe and really like how simple the implementation is. But despite that, I'm still having some difficulties finding the best way to implement it into my e-commerce site.

In this site, a customer can add to cart a regular item and subscription item. For example like this:

Item A                   $ 10
Item B                   $ 20
Subscription C (Monthly) $ 10
Subscription D (Weekly)  $ 5

And at checkout, I want to process all those items at once.

I am thinking of implementing it like this:

First create the customer

$customer = \Stripe\Customer::create(array(
  "source" => $token,
  "description" => "Example customer")
);

Then charge the regular item price (30$ from example above)

\Stripe\Charge::create(array(
  "amount" => 3000, 
  "currency" => "usd",
  "customer" => $customer->id)
);

Then charge the subscriptions using for loop

foreach ($plans as $plan_id) {
  \Stripe\Subscription::create(array(
    "customer" => $customer->id,
    "plan" => $plan_id
  ));
}

But I'm feeling that my code above is not the correct way to do this. Also it would result in many charges (as many as the subscription) and I don't think its a good idea.

I would like some advice on how to properly solve this problem.

I highly appreciate any suggestion. Thank you!