Campaign Management Tool Advanced Topics

We all are very much familiar with variables in Campaign Classic. But in Standard, it is not easy to declare or use variables inside workflow. There are activities like Load File, Transfer File and other which supports the variables like var.filename or other activities supporting var.reccount in the same way as Classic. But using custom variable is not as simple as ACC and here is one of the ways I tried The first End Activity is calling the Signal activity and while calling, passing the variables and their values as below Below  Signal activity is configured with the same set of variables as the End Activity above. Also you have the option to mention the data type of the variables (String and Number in this case). In the Query Activity (which for no reason I choose the Sending Log as dimension), you can add the variables using the syntax $(var/@varName) format as was used in Classic. Also the $Int exists as well. I tried to check different outcomes as you can see in the screenshot wh