Confused about line 5 on IRS Worksheet 2 Worksheet for Determining Support (Child)

I am at #5 on the worksheet.

 

Funds Belonging to the Person You Supported   
1.Enter the total funds belonging to the person you supported, including income received (taxable and nontaxable) and amounts borrowed during the year, plus the amount in savings and other accounts at the beginning of the year. Don't include funds provided by the state; include those amounts on line 23 instead1._____ 
2.Enter the amount on line 1 that was used for the person's support2._____ 
3.Enter the amount on line 1 that was used for other purposes3._____ 
4.Enter the total amount in the person's savings and other accounts at the end of the year4._____ 
5.Add lines 2 through 4. (This amount should equal line 1.)5.

 

Line 1 is income + bank account balances at the beginning of the year

Line 2 is amount from line 1 used for their support

Line 3 is amount from line 1 used for other purposes

Line 4 is amount from bank account balances at the end of the year

Line 5 says that lines 2-4 should equal line 1.  That can't possibly ever be true.  Bank balances at the beginning of the year are never the same as the ones at the end of the year.  I am confused.