Let's say your team has received a project charter from an internal customer -- the president of the company who is the project sponsor. She estimated the project to cost $50,000. Your team, under the direction of the project manager, then did some bottom-up estimating and found the project is likely to cost more like $75000. How would you approach the president about increasing the budget? What information would you provide, and how would you make a case for the new cost?