Use the same order sample before and during the pilot. Record active handling time for each role, including checking and exceptions. Exclude time already counted by another role.
The worked example is an illustration of arithmetic, not a prediction for your company. Use the existing ROI calculator with your measured time, order volume and employment cost. The pricing page determines the current subscription for your market.
Keep three outcomes separate: staff capacity released, cash costs actually reduced and additional sales. A shorter handling time can create capacity without changing payroll. Approval requirements and unresolved orders remain part of the measured workload.