Thank you for the response Shiva.
I have checked and there is no conditional formatting for Total Amount.
Also, we observed that this issue is occurring whenever there are 6 lines.
When there are 6 lines, these lines exactly come till the end of the page and the Total Amount filed is moved to next page.
Just beneath the Total Amount value we have Boiler Plate text to display underlines like --------------
This line gets printed but not the total.
Please provide some insight on this.