Fix calculation of tax on line item amount

[jitendrapurohit]

Overview

Fix calculation of tax on line item amount if the field is displayed on payment page.

Before

To replicate:

• Create a webform with contribution amount and line item amount.
• Ensure financial type set on both the field has 15% GST applied to it.
• Ensure both the field are set to display on second page (payment page).
• Submit the webform.
• On payment table, only contribution amount row displays 15% tax.
• Line item amount is displayed without tax amount.

After

Fixed

Technical Details

Consider tax amount for line item if its included in the webform.