When you are working with a brand or agency on a paid opportunity, you should see the total payable amount listed at the top of your Campaign Details page:
Additionally, you can look out for the 'Get Paid' section on your Campaign Details page to see how your total payable amount breaks down:
In this example, you can click on the Earn up to $50 button to view the payment summary based on the Campaign Requirements. If the payments are split by post, you'll see multiple line items listed here: