Yes, I can import if I don't do any temp for the purch. u/m. I don't think it's the calc, I think it's the file assign of the conversion factor. The only select option is to skip the header which works fine if I only test one record, which it skips successfully. It's when I do the first item record that it blows. I checked the syntax and it seems fine to me.
Here is the import job, the calculation, and the error.