Calculation Widget is not calculating correctly

Hi, I'm trying to enter a formula to the form calculation widget to simply add the entered value in cells for total daily hours. However the calculation total is just picking up all the cell values into a string of data. Can you please help? The form I am building is 

The calculation formula you entered inside of the Form Calculation widget is not set up properly. You should remove the + sign you added in front of the first field and add it between all form field to sum the values entered inside of the Input Table field. You should set calculation like this. 

Here is a demo form - https://form.jotform.com/90731509303956 

Feel free to test it and clone it. 

I would also suggest you to check the following guide:

How to Perform Form Calculation in the Matrix Field?