(b) For a district that opts to divide its entire classroom facilities needs into segments to be completed separately as authorized by section
3318.034 of the Revised Code, an amount necessary to raise the school district's net bonded indebtedness, as of the date the controlling board approved the project, to within five thousand dollars of the following:
The required level of indebtedness X (the basic project cost of the segment as approved by the controlling board / the estimated basic project cost of the district's entire classroom facilities needs as determined jointly by the staff of the Ohiofacilities construction commission and the district)