From Lesson 9 : Column C = Col A + Col B doesn't be as expected (about Excel & Data table)

Hi, all

I practise lesson 9 about Excel & Data table, I expected that system will auto cal Col C from ColA+ColB but it’s seem doesn’t work as this pic below


How can I fixed it? Please advise.

I don’t know why answer in column C1 came from A2+B2 , So it should be comes from A1+A2

Main.xaml (10.7 KB)

Thank you

@shawty_n Check attached zip file

ExcelSum (27.2 KB)

@indra - this of you too advance for me for knowing that why i am wrong, so i will to know what’s wrong in this part of my exercise.