Pricing happens when the item is in front of you, not when the customer booked. Line items can now be entered and adjusted on a phone at the point the item is seen.
Enter It However You Charge
Quantity, pieces, measurement, unit price, a flat amount or a one-off item — the entry screen matches how that service is actually priced.
Review Before Finalising
A review step shows the complete order with its total before it is finalised, which is the last chance to catch a mis-keyed price.
Sales Returns
Returning items and adjusting the amount is handled as its own step, rather than by editing the original order into something it was not.