Advanced Excercise Calculate Client Security hash, my transaction item number is not incrementing, alwas have 1

My Transaction item it always have value 1, I do not know how does it change to +1. I don’t know where I have to increment that value. if in Process XAML get item data XAML or main XAML. could you please guide me in My Get Item Data I have it as following image. These are my variables before calling Get Transaction Item Data. XAML

When calling Get Transaction Data I have arguments as below image:

And inside get transaction data

My worklow is as following

I appreciate you guide me where it is missing to add or to skip next record of array of datarow.

Thank you very much in advance