Cleaning up data

Hello everyone,
I have a file which lists inventory by store. The problem is, the store numbers are listed first, then the inventory is listed underneath. Each item is seperated by a SKU (unique identifier). The width of each inventory/store listing is either 13 or 14 units wide.
I am trying to get all of this information in a format which is one line tall and about 200 lines wide.
For example:
SKU, Description, Size, Inventory Quantity Store 00, Inventory Quantity Store 01, Inventory Quantity Store 02, ...Inventory Quantity Store 500..., etc. Please keep in mind I have about 25,000 lines of informatin in my real files, so a macro approach is preferred.
Could you point me in the right direction? I attached a file for better understanding. Thank you!