Channel Revenue Management

I have a question where when we are creating supplier programs for rebate accruals - do we have an excel upload feature where we can load all the items and the associated discount % using this excel rather then creating manually one by one.

Since the client is having a concern where there are 1000 items which the organization is dealing with supplier then for these they would have to create 1000 lines manually and if excel upload feature is available, can you please refer or suggest the link for the same.

Thanks

Manish