The cost for the project was estimated using direct and indirect costs. The direct costs were calculated using bare unit cost of the equipment and labour. Site preparation had a lump sum direct cost of $50,000, which would include rental of site facilities and installation. Clean up was set at a lump sum direct cost of $30,000, since it would still require labour to take down and transport back, but no rental costs. all indirect costs were calculated as a percentage if direct cost. The exact percentages can be seen in the table below.
In this high school construction project, direct cost and indirect cost share approximately the same amount from the total bid price shown in the left part of the chart. The right part zooms in to the branches of indirect cost, which indicates that the overhead and profit makes up the biggest item.
To be more conservative, the contingency is set as 15% of the direct cost, which equals 7.42% of the total bid price.