How much retention will have been deducted by the client.

Assume this is a $10 million construction project and $8 million, including fees and other markups, worth of work is in place and has been invoiced. How much retention will have been deducted by the client based upon the following three scenarios?   (a) 10% retention rate   (b) 5% retention rate  (c) 10% retention rate until the project is 50% complete and no further retention held  thereafter.