To limit the amount of time and cost of using a contract programming firm, a...

Have the product manager work with the scrum master to assign specialists to user stories to meet the requirement.

Convert the story points on user stories to hours to provide estimates of the potential costs to the product manager.

Ensure that the task board is used as an information radiator and all stories have enough detail to build the required feature or function.

Refine the definition of done (DoD) for user stories to ensure that part of the completion is a verification review of the code.