I would imagine this has been suggested before as it seems to be a popular idea (based on discussions I have had within the Marketo UK user group).
Have a data loader that eliminates the need to add program costs one-by-one / manually.
In other words, the ability to upload an Excel file of costs directly into a Marketo program to update/replace that program's costs.
Reference was made in the discussions to the SFDC data loader.
Thanks!