How to calculate Sum of Means ?

[#1]

Help me write some expressions, attached is the sample document

My first chart i.e. "Avg Mean Price Per Product" would be like

Sum(Mean price of all purchases of a customer)/Total Number of Customers

My first chart i.e. "Avg Mean Price Per Product" would be like

Sum(Max price of all purchases of a customer)/Total Number of Customers

***     There can be multiple purchases for a product against single customer. I have updated the document too.

Any help is highly appreciated.

Message was edited by: Mubbasher Khaliq (Multiple purchases for a product against single customer added)

[#2]

Thanks alot, It solved my problem.