Bidding sheet

I am an excavating contractor that puts complex land and utility bids together that have multiple line items for each number the client sees including trucking, materials (potentially up to 20 items per line item price), equipment hourly costs, and labor costs. After those prices make up a line item we will have add-on percentages that will mark up each line item using customizable percentages like labor burden, equipment maintenance, overhead and profit, sales tax and others.