All assets in an order (including imagery, UDM/UDM2, and XML/metadata) are subject to Processing Unit (PU) consumption.

For example, when ordering an analytic_3b_udm2 bundle for PSScene via the Orders API, the 20 PUs for asset activation are applied per asset in the bundle, per item. Likewise, tool charges (e.g., Clip at 1 PU per data asset, and other tools at 2 PUs per data asset) are also applied to each asset in the bundle. 

Learn more about the PU rules in our documentation site:  Understanding Processing Units (PUs)