How to populate prices and charge array set when available rate Plan is selected

We have created 3 rate plans for all subscription parts, when configuring these parts, the first rate plan is selected by default, and the prices and charge array are populated with the details of this rate plan.

When we select a different rate plan from the Available rate plans LOV, the prices and charges did not update as expected. Our expectation is that when we select a different rate plan, it should automatically refresh the prices and charges accordingly.