1003.4(a)(9)(2) explains what is expected for reporting total units.
For aspects of the entries that do not refer to the property identified in § 1003.4(a)(9) (i.e., § 1003.4(a)(1) through (4), (7), (8), (10) through (13), (15) through (28), (31) through (38)), Financial Institution A reports the information applicable to the covered loan or application and not information that relates only to the property identified in § 1003.4(a)(9).
This is interpreted that you would report total units securing the loan, not just what is related to the property reported.