The Answer Should be C

Percent of Total (%)

A Percent of Total product’s price is this percentage of the summed price of its covered products. Salesforce CPQ uses this product’s percent of total base to determine the price field (such as list price, net price, or customer price) used in this calculation.

Percent of Total Base

Define whether your Percent of Total product calculates its price based on the list price, net price, customer price, or regular price of its covered products. If you don’t choose a value, calculations default to the list price.