Hello Tax Preparers

I'm working on a 990-EZ, which I don't do often.  I'm stuck on Schedule B as none of the contributors who gave over $5,000 are individuals.  All are corporate donations.  

Was I supposed to list those as "other revenue" on line 8 in part 1 rather than as "contributions" on line 1?  The real issue is that if I list all the corporate donations on Schedule B,  which are all over $5,000, column D there asks if the contributor is a Person, Payroll or Noncash and it is none of those so I get a diagnostic if I leave it blank.

Anyone have any ideas?  I thank you all in advance for any help.  I know this is on extension until November 15th, but I'm trying to clear my backlog!  As I'm sure many of you are doing too!

Beth