7X17 at 1600 dpi grayscale and resulting file is 580mb.
If cost analysis were the only consideration you would be right in that making a duplicate exposure might be a better solution. But most films available for ULF (TMY excluded) do not provide enough contrast for the processes I print with, regardless of developer and length of development time. So my choice is either scan and make digital negatives, or make enlarged negatives on high contrast lith film. Both methods are capable of equally good results, but I prefer the former as a more productive work flow.