Is someone able to explain to me why there is a cost difference in the roll up of the material costs for this part?  The Accumulated Cost for the Estimated Material cost of the component is 0.20374 for 2921-88-2.  The QPA for 2921-88-2 for the parent part 2921-88-2_HC-ML is 10.  From this you would expect the Accumulated Estimated Material Cost for 2921-88-2_HC-ML to be 2.03740.  However, it shows as 2.03742.  Why?