Lines 8-14:  All NO except 11,13,14 blank.  

Line 20A, 21:YES   Line 23(a)(b)(c):18   Lines 24-28:blank.

Calculation works if I answer YES to no previous use of exclusion in last 24 months.  But, it is more beneficial to use the Unforeseen Circumstances option and save the 24 month exclusion.

There is a gain on the sale.