The Price for each Cost Type is defined in an Excel App. You have to replicate the Cost Model, defining various Cost Types and their pricing with the help of X-Author Designer. When you click Configure button on the Quote/Proposal, pricing data from this app is fetched and shown for analysis.
To get started, you will need to Install X-Author and Designer and Runtime packages.
App Setup
Install the following packages:
X-Author for Excel (3.25 or higher)
Conga X-Author™ For Excel Document Generation (1.0)
Conga Document Generation (1.5)
X-Author Designer for Excel
Getting Started
In your Salesforce org, create a Cost Model and add Cost Types.