Yes, you can display the payment summary of your online order form in real-time.
Go the Form Editor and scroll down the E-commerce section. Choose your payment gateway and enable it.
Once the payment processor is enabled, the payment summary will be displayed in the main view.
Click on Payment Summary and navigate to the left-side panel. Enable Show live order summary. Here you can also change the currency and add discounts, taxes to the total.
The Columns section allows you to rename your summary table columns.
Preview your form. The payment summary will be automatically displayed on top of the form. By default, it will be folded and can be expanded on click.
If you are using another version, check out this article with the same subject.