Please describe the top-down and bottom-up approach in budgeting and methods of cost estimating (i.e. expert judgement, analogous estimating etc.). How can these tools and techniques be relative to...

Please describe the top-down and bottom-up approach in budgeting and

methods of cost estimating (i.e. expert judgement, analogous estimating etc.). How can these tools and techniques be relative to planning a nonprofit fundraising event.