Service Charge didn't count from previous amount

[cynthia]

Hi,
I have a setting for service charge

and that sort like this

But, in my ticket, that service charge didn’t count from previous amount
that i need is (Ticket Total - Voucher Discount)*5% > it must be 46.760 but here is 58.450

Can you help me, please?

[RickH]

Try ticking the use plain sum option in your calculation type