That works as well. So he can use that. for now.
Ok @madiha here is what you do.
Delete all your rules and actions that are related to the calculation you had.
Make the following Script by navigating to Automation > Scripts
Script:
result = (round up (Ticket.PSum + Ticket.PreSum + Ticket.Tax) * 20)/20 - (Ticket.PSum + Ticket.PreSum + Ticket.Tax)
Handler:
Calculation_Auto Round
Change your Ticket Calculation as follows:
Set a Calculation Selector as follows:
