Is there a way we can use the cell input value for the calculation?

is there a way we can use the cell input value for the calculation? eg: for a cell that collects a number for total hours worked, can we use that value rather than a static value that I apply if the field is filled?

That's also possible. Here's a guide: https://www.jotform.com/help/414-Calculate-Values-in-the-Input-Table-Through-Condition