Question about apply recurring plan and usaged plan

Shopify Apps
1

Hello guys, I have a question about combine recurring plan and usaged plan, I’m following docs here: https://shopify.dev/docs/apps/billing/subscriptions/recurring-charges-based-on-usage

when I get current plan I have payload like:

My question is when app automatic monthly charge, It will price of recurring plan + usaged plan? In this case is 99.0 + 3.0 USD?

Thanks in advanced.

"status": "ACTIVE",
                    "test": true,
                    "lineItems": [
                        {
                            "id": "gid://shopify/AppSubscriptionLineItem/30604951857?v=1&index=0",
                            "plan": {
                                "pricingDetails": {
                                    "interval": "EVERY_30_DAYS",
                                    "price": {
                                        "amount": "99.9",
                                        "currencyCode": "USD"
                                    }
                                }
                            }
                        },
                        {
                            "id": "gid://shopify/AppSubscriptionLineItem/30604951857?v=1&index=1",
                            "plan": {
                                "pricingDetails": {
                                    "terms": "$1 for 1000 impressions",
                                    "cappedAmount": {
                                        "amount": "799.0",
                                        "currencyCode": "USD"
                                    },
                                    "balanceUsed": {
                                        "amount": "3.0",
                                        "currencyCode": "USD"
                                    }
                                }
                            }
                        }
                    ]
                }
2

Or anyone can give me way to test billing feature when my app has an automatic monthly charge? I cannot find any solutions about this.

Thanks in advance