Deductions & credits

Hello.  I spent a lot more time going through the Worksheet....and I'm still confused.  I worked through the Household expenses (Lines 6-11) when my Dad & Mom lived together (for Jan-Oct) and cut those in half for Line 13. I then looked at the Household expenses (Lines 6-11) when my Dad lived alone in dementia unit (Nov-Dec) and he had no Household expenses because all his expenses were "medical expenses"included in Line 16.  I then completed Lines 14-18 for my Dad's "personal" expenses which were essentially all medical expenses through the entire year (including the aides for Jan-Oct and the cost of the dementia unit for Nov-Dec). I did not include in any of these lines what I personally paid the aides and dementia unit myself. I think my problem is what I'm putting in Line 2. I am putting in Line 2 the portion of my Dad's Household expenses (Line 13) plus his personal expenses (Lines 14-18). So my Line 19 equals my Line 2. So, of course, my Line 21 (which equals my Line 2)  is more than Line 20 and I answer "Yes" and my Dad doesn't meet the criteria which makes no sense. So I believe that I'm thinking about Line 2 incorrectly.  What goes in Line 2? It obviously should not equal my Line 19, right? What does the amount of my Dad's funds on Line 1 (which includes his beginning-of-year assets plus his income during the year) "used for the person's support" mean?  I assumed it meant what he spend on his expenses (prorated Household expenses plus his personal expenses) , but my interpretation must be wrong. Thanks!