Total Fixed Cost of the Proposal. The total fixed cost of the Proposal shall be determined by adding the total Proposal price offered for Pre-Priced and Non Pre-Priced Work units. After a Non Pre-priced Task has been approved by the County, the Unit Price for such task will be established, and fixed as a permanent Non Pre-priced Task, which will no longer require price justification. The County’s determination as to whether a task is a Pre-priced Task or a Non Pre-priced Task shall be final, binding and conclusive as to the Contractor.