print preview with sum of user entered values

Question

hi,

i have textbox1 and textbox2

i used numbers in textbox1 

1

2

3

4 

when i click the button it shows sum of textbox values 

in textbox 2 i e = 10

my question is if i click  print preview dialog it should be show print preview like below

1

2

3

4

------

10

-------

if i used

 1

2

3

4

5

6

print preview wil be

1

2

3

4

5

6

----

21

----

plz help