...
- Create a Machine to stand for the Total Machine
- Create all the individual meters on the Total Machine that you want to be aggregated from the child machines.
Each meter on the total machine needs to have the same name as the corresponding meter on the child machines.
Each meter that is to be charged from the total machine needs prices to be setup on the total meter.If you are using Meter Product Pricing, then on the total machine for each meter product price , when you extract a meter count run the aggregation pricing will be the sum of each meter product price multiplied by the count variance.
When extracting a meter count run for Total Machines by Count, it is not until you click on Finalise that you will see the Type = Aggregation with a Value for the Total MachineExpand 
- In the very unusual case where you want to charge both child and total machines or where you are using value aggregation, you can put a price on the meters on the child machines as well. If you do this both the total machine and the children machines may charge for the same meter counts. Discuss this with Readysell if you believe you may want to use any option like this.
- Normally you aggregate quantities by count to the total machine and put all prices on all the meters on the total machine
- You can set your total machine to sum up the values from all the children machines using the 'Value' aggregation mode. Please stick to to t 'Count' aggregation and talk to Readysell if you think you might want to use 'Value' aggregation
- Set the aggregation mode on the total machine to be either 'Count' or 'Value' for all meters
- Set the 'Count Required' check box OFF on the Total Machine
...